Description: this paper points the first Ⅰ Ⅱ volume and first two parts, a total of 100; The answer time 100 minutes.
The first Ⅰ (multiple choice 50 points)
A, single topic selection (1 point per question, a total of 50 points)
1. Variation is one of the basic characteristic of biological, genetic variations of the following does not belong to bacteria have a ()
(1) (2) genetic recombination (3) chromosomal mutation gene mutations
(4) the change of environment conditions (5 chromatid exchange 6 on the same chromosome than free combination of alleles
A. (1) (2) (3) B. (4) (5) 6.
C. (2) (3) (4) (5) 6 D. (1) (2) (3) (4)
chromosome
Gene sequence change a
123-123. b
123-123. c
11654-11654. ding
123-45676789
2. Flies on a chromosome, the order of the normal gene is 123-456789, \"-\" represents the centromere, expressed in the table by the chromosome mutation gene sequence change. The narrative is wrong ()
A. A is the result of the chromosome segments of A certain position upside down B. B is the result of the chromosome segments of a missing C. C is the result of the centromere chromosomes change D. reading is to increase the segments of a chromosome
3. Common is hexaploid wheat, 42 chromosomes, scientists use anther in vitro culture of wheat seedlings are ()
A. triploid, 21 chromosomes C. triploid, three chromosomes B. the haploid, 21 chromosomes D. the haploid, a genome
4. The following situation, belong to the chromosome variation is ()
(1) in patients with down's syndrome cells chromosome 21 in article 3 (2) the corresponding part of the cross exchange between chromosomes
(3) chromosome number increase or decrease (4) grown plants after anther in vitro culture (5) the free combination between homologous chromosomes
6 on chromosome DNA base pair of add, missing all landowners the cat call syndrome patients cells chromosome 5 short arm is missing
A. (4) (5) 6.
B. (3) (4) (5) all landowners C. (1) (3) (4) (5) all landowners D. (1) (3) (4) all landowners
5. The cells contained in the chromosomes, as seen here is not correct () of the following statements
A.a representative organisms may be diploid, its each genome contains a chromosome B.b representative organisms may be diploid, its each genome contains three chromosomes
Arthur c. representative organisms may be diploid, its each genome contains three chromosomes D.d representative organisms may is haploid, its each genome contains four chromosomes
6. As shown in figure said AaBb rice haploid breeding process, the following statement is not correct ()
A. the pollen bred of diploid rice genotypes of aaBB B. the haploid breeding than cross breeding time is short
C.a. aBb rice by the haploid breeding only showed two diploid rice water
D. without colchicine treatment in vitro MiaoChangCheng plant height of infertility
7. Of malignant ichthyosis normal men and women marry, they are sick, the son of his illness, grandson, granddaughter is not sick, are sick of malignant ichthyosis genetic way as the ()
A. autosomal dominant inheritance C.X chromosome recessive
B.X chromosome dominant inheritance D.Y sex chromosomes genetic
8. Here is the family tree of genetic disorders of progressive muscular dystrophy, the disease is recessive sex linked genetic disorders, Ⅲ 1 disease genes from ()
A. Ⅰ 1 C. Ⅰ 3 B. Ⅰ 2 D. Ⅰ 4
9. With homozygous diploid rice varieties high stem rust resistance (DDTT) and stem rust resistance breeding (DDTT), a kind of method is get F1 hybrids, in F1 and F2; Another method is to use an F1 anther for in vitro culture, reoccupy colchicine treatment plant seedlings change
accordingly. The right of the following statements is ()
A. the former method of F2 in restructuring homozygous type, each 5/8, 1/4
B. the former method of the proceeds of the plant can be used in the production of types in proportion to 2/3
C. the principle of the former method is genetic recombination, reason is homologous chromosomes free combination
D. the latter method is the principle of the chromosome variation, is due to the chromosome structure change
10. The following account of DNA ligase is correct ()
A. d. NA ligase connection is the hydrogen bonds between the two chain base pairs
B.D NA ligase connection is sticky end two chains on the main chain of phosphoric acid and DNA C.D NA ligase connection is sticky end two chains on the main chain of phosphoric acid and RNA D. the same DNA ligase can cut out different sticky end
11. The following concerning the describe of plasmid, the correct is ()
A. plasmid is one of the widely exist in the bacterial cell granular organelles
B. plasmid is bacterial cells that can be independent replication of small circular DNA molecules C. plasmid only after the invasion of host cell replication in host cells
D. bacterial plasmid replication process must be independently in the host cell
12. Maybe there are some security issues, genetic engineering products but don't have to worry about ()
A. triploid transgenic carp with normal carp, resulting in natural populations
B. vector marker genes may guidance synthesis for resistant products of evolution C. the product of the gene encoding itself may be toxic to the human body
D. the purpose gene transfer through pollen spread to other plants, which could break the ecological balance
13. In guinea pig, black on white is dominant. If 90% is the dominant gene B in the gene pool, 10% is a recessive gene, B populations BB, BB, BB genotype frequency were ()
A. 81%, 18%, 1% C. 18%, 81% and 1% B. 45%, 40% and 15% D. 45%, 45% and 10%
14. Modern evolutionary theory of Darwin's natural selection the perfection and development of performance in ()
1) mutation and genetic recombination in the evolution of raw materials (2) is the basic unit of the evolutionary population
(3) natural selection is achieved by the struggle for life (4) decided to the direction of the biological evolution by natural selection
(5) the essence of biological evolution is the change of gene frequency 6 segregation results in the formation of species
7) the survival of the fittest, unfit person out
A. 2. 5. 6.
B. (2) (3) (4) 6. C. (1) (2) 5) 6.
D. (1) (2) (5) all landowners
With 15 species of individual often some of the differences in morphology, but there are differences between the form of individual, on the ability to adapt to environmental change will be a little different. Somewhere below for three different plant leaf area and the number of individual diagram, if drought in here, then which of the following accounts a most reasonable () A. b species adaptable than A species in the area B. a species adaptable than B species in the area C. C species adaptable than b species in the area
D. a species and b species in the area at the same ability to adapt
16. In the human body structure, of the following is not directly involved in the regulation of temperature is ()
A. the hypothalamus C. the skin
B. back before the middle of the cerebral cortex D. the adrenal
17. The following description about homeostasis regulation is not correct () A. the internal environment is relatively stable physical and chemical properties
B. in the internal environment of pH adjustment by neuromodulation and constant temperature is a neurohumoral regulation process
C. the regulation of water and inorganic salt balance are interlinked, a variety of hormones involved in the regulation of blood sugar, insulin is the only fall blood sugar hormone D. homeostasis, unable to maintain the body's life activities will be threatened
18. The stability of the ecosystem and nutrition structure complexity of relation curve is correct ()
19. A series of experimental process shown below found auxin (experiment material is oat coleoptile). Which belong to control experiment is ()
A. 2, 5 B. 1, 4, C. 4, 5, D. 3, 5,
20. When bacteria exotoxin invades the body again, mainly is the humoral immune function, and its \"reaction stage\" and \"effect stage\" immune process are respectively () A. - effect of B cells, immune active substances to eliminate release toxins
B. effect B cells to produce antibodies, specificity combined with external toxin C. memory cells and B cells, eliminate exotoxin release immune active substances
D. memory cells and effect of B cells, specific antibodies produced combined with external toxin
21. The following error narrative about neuromodulation is ()
A. in stimulating neural spike grow rich environment of normal children and synaptic quantity will increase
B. when part of a nerve fiber is stimulated when excited within the membrane potential, membrane of negative potential, the current in the membrane by the exciting part flow not excited, outside the membrane by not excited place to place
C. excited only in the form of local current in multiple one-way transmission between neurons D. efferent nerve axons on one point stimulation and excitement will end to the axon conduction 22. Below is the regulation of thyroid activity diagram. The understanding of the figure, is not correct ()
A. figure X and Y are respectively in the hypothalamus and pituitary
B. the picture a and B are respectively thyroid-stimulating hormone releasing hormone and thyroid stimulating hormone
C. the regulation of thyroid activity only promote hormone by the pituitary gland D. the thyroid hormone levels in the blood to play the role of a feedback regulation 23. The phagocyte play a role in the humoral immune stage is () 1) infection stage (2) (3) reaction (4) effect of phase induction phase
A. in (1) (2) phase B. in (2) (3) stage C. in (1) (3) phase D. in (2) (4) stage
24.18. A good economic benefit of artificial fish ponds with producers (phytoplankton), a primary consumers (predators), secondary consumer (carnivorous fish), disintegrator (microbial). Producers of all energy for a fixed into the energy of the primary consumers, secondary consumer, disintegrator followed by b, c, d, of the following statements is correct ()
A.a = b + d B.a > b + d C.a. < b + d Da = b + c + d
The sea urine
Pouring drinks
Chlorine concentration discharge
Chlorine concentration a 1000
535 1350 400 b 1000 535 165 820
25. Scientists study a, b two living in different habitat mammals, forced to fill drink water after 1 L respectively, and analysis of urine and its composition, results in the following table. If a, b two animals on the bamboo raft, letting it drift in the sea, for feed not only for drinking water, the result will be how to ()
A. A than b first to die for lack of water B. B than a to die for lack of water
C. party a and party b can drink the water of the sea, and live ye D. data in the table is insufficient, so can't judge
26. The following description of how the human body life activities is correct ()
(1) for the heavier diabetes patients, in addition to diet, still need to take insulin treatment according to the requirements of the doctor
(2) for patients with high fever is not retreated, suit the remedy to the case in treatment at the same time, also can be used with the quilt, increases the amount of sweat to help lower the body temperature
Are too many (3) when the body salt intake, the kidney through the urine excess sodium, salt intake, almost without NaCl in the urine, so the excretion of sodium intake is almost equal to the human body
(4) if a limb govern afferent nerve and central is complete, the efferent nerve damage, so no feeling but the body of acupuncture can exercise
A. (1) (3) B. (2) (4) C. (1) (4) D. (2) (3)
The thyroid gland resection in mice, after 10 d to be compared with the mice without the resection of thyroid, resection of thyroid metabolism ability of rats decreased obviously, and can't check out the thyroid hormones in the blood. After resection, 5 d, will be dissolved in a solvent of a certain amount of thyroid hormone to mouse continuous injection of 5 d, 10 d after observation, their metabolism ability did not. Which can be speculated that: thyroid hormone can enhance physical ability to metabolize. To prove this reasoning, it is necessary to compare experiment, to observe compared. Do you think which of the following is the most appropriate contrast group () A. neither resection of thyroid, thyroid hormone injections of the experimental group B. from the 1 d after resection, only injection of solvent used in the experiment group C. from the 5 d after resection, only injection of solvent used in the experiment group
D. will dissolve in another solvent (as opposed to the above solution) of thyroid hormone
injections to just finished surgery group
28. The following concerning the describe of the ecological system structure, the right is () A. each ecosystem can only in A nutrition level
B. animals belong to consumers, including herbivores in the second trophic level C. autotrophic organisms are producers, is the main component of ecological system
D. bacteria belong to disintegrator, its disassimilation type has two categories, aerobic and anaerobic
29. Research shows that, in the process of human body cell immune effect T cells can secrete a kind of called perforin protein. Perforin can be infected cells or tumor cell membrane dissolve to form a hole, lead to the disintegration of target cell death. Associated with the immune process of the following statements is not correct ()
A. in the process of the effect of T cell function of perforin belongs to lymphatic factor.
B. target cell death, the invasion of viruses in the target cell pass humoral immunity shall be destroyed
C. effect T cells ACTS on the target cells can activate the target intracellular lysosomal enzyme, changed the membrane permeability
D. in effect T cells play an important role in the process of perforin organelles are endoplasmic reticulum, golgi apparatus, mitochondria
30. Right said movement before and after the change of blood lactic acid concentration curve, please after careful analysis, the curve changes do you think the curve of the BC explanation is correct ()
A. lactic acid react with NaHCO3 generation of CO2 B. lactic acid react with Na2CO3 generated CO2 C. generate H3PO4 lactic acid react with NaH2PO4 D. lactic acid react with Na2HPO4 generated NaH2PO4
31. The nitrogen cycle is illustrated below, the following is not correct: ()
A. (1) fixed by organisms in the process of nitrogen fixed nitrogen than any other way B. (2) process for heterotrophic aerobic biological metabolism of type type
C. (3) and (4) in the process of biological mainly producers and consumers respectively D. (5) can increase soil fertility, is conducive to agricultural production
32. The right is a team of inquiry learning is to do research and draw the farmland ecosystem into the food web, they make the following conclusion is not correct: ()
A. is the total energy flow diameter of the ecosystem of plant accumulation of organic matter B. farmers weed control and extermination of the purpose is to adjust the direction of energy flow, more to make energy for humans Good place
C. the ecological system contains five or more species
D. field rotation (rotation planting different crops a year) to change the original nutrition structure, reduce plant diseases and insect pests
33. The picture on the right for the growth of the plant community stratification, phenomenon explanation is not correct ()
A. is statified phenomenon associated plant communities and environmental conditions of A form B. decided to the phenomenon of environmental factors in addition to the light, temperature and humidity
C. planting corn, because of the existence of the plant community stratification, so be reasonable close planting
D. on the agricultural production, can make full use of this phenomenon, reasonable collocation planting varieties
34. If a composition have four kinds of biological and ecological system in a food chain. Is respectively measured at a time of these four biological (a, b, c, d) contains the content of organic matter, shown in the table below: Biological species a b c ding
The total organic matter (g) 550 100 3000 18
Over a period of time, if the b population decrease, the cause ()
A. party A and d population decrease, c population increase B. B, c, d populations were reduced
C. a, population increase, C population decrease D. a population increase, c, D population decrease
35. To remove the dog after thyroid gland, thyroid stimulating hormone secretion and metabolism activity will ()
A. thyroid-stimulating hormone secretion to increase, metabolic activity
B. thyroid-stimulating hormone secretion to increase, enhance metabolic activity C. reduced the volume of thyroid stimulating hormone secretion, metabolic activity
D. reduced the volume of thyroid stimulating hormone secretion, enhance metabolic activity 36. The following about antibody, the correct is ()
A. the chemical nature of the antibody mainly protein, is A small number of RNA
B. the body's antibodies are mainly distributed in the serum, also has in the outside tissues and fluids
C. antibodies can be applied to both extracellular antigen, and ACTS on the intracellular antigens D. antibodies in the human body including interleukins, interferons, etc., it is able to combine with the antigen specificity
37. In recent years, with the invention and application of some new antibiotics, indeed improved the clinical effect. But, also caused some negative effect. For example, some for a long time, large doses of cephalothin patients, it showed the belly bulge and indigestion, and sallow and emaciated, what do you think is the main reason for the ()
A. the human digestive gland secretion was new antibiotics
B. human small intestinal villus is new antibiotics inhibit absorption function C. new antibiotics changed food chemical structure
D. new antibiotics destroys the human intestinal microbial balance
38. A group of science and technology of 2 hm2 in investigating a pasture in the number of ash pale rat, placed 100 rat-trap, captures the 50 overnight, will capture the ash pale rat after marking the in situ and set them free. Five days later, at the same location to place the same number of rat-trap, captured only 39, including the last individual tag only 13. Then the pasture ash pale in the rat population is the most close to ()
A. only 50 B. 42 92 C. 160 D.
39. The following expression about the impact of human activities on the evolution, the correct is ()
A. the influence of human activities on the community is destructive
B. human activities to the relationship of biological and environmental control
C. the influence of human activities on the community more than all the other natural factors D. human activity, often make the direction and speed of the community according to the different from the natural succession in succession
40. The figure below (A) as shown in the relationship between biological, A and B represent two organisms, C represents creatures living conditions, the arrows represent the direction of nutrient flow; Figure (2) said in the coordinate system of the relationship between two organisms. In the following figure (a) (2) represented by biological relationship matching the right is a set of ()
A. (1) - A B. (2) - a C. (3) - C D. (4) - b
project A (leaf B leaves
Surface area (was) 292 144
Volume (mm3) 64 63
Epidermal thickness (um)
14 24
41. A cold wet spring, summer high temperature and drought region grows a spring and summer leaves different plants, laid type data in the following table. Try that () A. A (leaf growth in the spring, good for photosynthesis B. B leaves grow in the spring, good for photosynthesis C. a (leaf growth in the summer, to reduce transpiration D. b leaves grow in summer, enhance transpiration
42. A damp in its forlornness up the grass, there was a pile of rotten wood covered with moss, which gathered the ants, the earthworm, rodents and other creatures, these creatures constitute a ()
A. the population B. community C. species D. ecosystem
43. The following information in the ecosystem function (application) is a description of the error ()
A. cast sex attractant, trap insect pests C. affect population reproduction
B. regulating the relationship between the biological species D. do not affect life activities
44. When one aphids is attacked, it will emit a warning role of chemical substances, so that the adjacent aphids escape DiHai quickly, this kind of phenomenon belongs to features and information transfer types were ()
A. kind of mutual aid, in chemical information C. interspecific mutual aid, chemical information B. interspecific mutual aid, behavior information
D. intraspecific and assistance and physical information
45.1998 years in one of the reasons for the catastrophic flood in the Yangtze river basin is ()
A. the Yangtze estuary tropical storm C. reservoir water too fast
B. the upper Yangtze river forest vegetation destruction D. the north sand bed becomes shallow
46. The balance of the fly rod theory is applied to the development of the carrier rocket that can reflect () in the value of biodiversity
A. potential use value
B. scientific value
C. the indirect use value Ecological value D.
47. The image below says auxin concentration effect on the growth of the plant roots and shoots and the stem, give you the information on this graph is ()
A. auxin has the function of the three organs of duality, low concentration and promote In growth, high concentration (such as 10-2 parts per million (PPM) inhibit growth
B.A, B, C points corresponding to the auxin concentration respectively is to promote root, bud, The most suitable concentration of stem growth
C.D point of auxin concentration of stem growth has a promoting effect, Inhibit the growth of the bud
D. young cells respond to auxin sensitivity, mature cells respond to auxin insensitive
48. The following graph respectively about the biological process, describing the variation of the curve, the right is ()
A. A figure the whole curve show that with increasing light intensity, enhance photosynthesis and respiration
B. B figure point B, insect pest populations resistant individual percentage is greater than the resistant individual percentage point A pest populations
C. commonly used in the production of a certain concentration of auxin analogue despite the dicotyledonous weed of monocots crops, C in the figure curve (1) says the monocotyledon D. butyl diagram b said warm-blooded animals
A limited environment. 49 as pictured said curve of population growth. The following relevant account correctly Is ()
1 K value is the environment condition is allowed to achieve maximum population (2) when the K value, the growth rate of population is the largest
(3) without consideration of other factors, such as moving out of the K value is equal to the mortality
(4) assuming this is fish populations, when the population to K value started fishing, reach the highest sustainable production
A. (1) (2) B. (1) (4) C. (1) (3) D. (3) (4)
50. The energy flow diagram part of the ecological system is illustrated below, 1 \"2\" 3 \"4 each represents a certain amount of energy, the following is not correct ()
A. eat and be the relationship between biology and biological irreversible, so energy flow unipolarity
B. (1) total internal energy flows through ecosystems C. In general, (2) to (1) 10% to 20%
D. from the energy relationship (2) > (3) + (4)
The first Ⅱ (not multiple choice 50 points) Second, the short answer
51. (7 points) a test site to breed new varieties of rice breeding, USES a variety of breeding method. One of the three kinds of breeding Method expressed by the following diagram:
(1) a and b in figure two breeding methods based on principles of genetics in ______________, __________________.
(2) to develop better rice varieties in a short period of time, recoverable Which breeding... with the above, this method is theoretically obtained The probability of yyRR is __________________.
(3) to conform to the requirements of varieties yyRR, b process needs to be __________________.
(4) c process commonly used reagent is colchicine, its mechanism is __________________.
(5) if you want to increase the mutation rate in the process of breeding, create variation types of human needs. Do you think the best should adopt what kind of breeding __________________. 52. (11) in the search for human genetic defects, often need to get some of the inbreeding of has a history of illness of pedigree, accordingly gene location. Scientists in an island residents, found out the blue color blindness caused by genes. The island is one out of every five blue color blindness gene carriers.
(1) (left) on the graph is A genetic family tree family blue color blindness, please answer the following questions: (analysis related genes expressed in A, A)
(1) the defective gene is located in the... sex, is located in the main propositions on chromosome. 4 (2) the individual genotype is alarm, individual 10 genotype is that...
(3) if the individual's mother is blue color blindness, then he and individual 12 regeneration is the probability of a color normal boy....
(2) on the (right) diagram for the two methods of blue color blindness gene, please answer the following questions:
Method (1) one, a process is done under the action of enzymes. If only one of these enzymes, can
not get the purpose gene, the reason is.
Methods 2, c process known as the ___________ in genetics; D process called ____, the process need is raw materials, on condition that mRNA, ATP, and DNA polymerase, etc.
53, (8) according to the human body heat production the main way is to answer the question: (1) in figure agency is hormone, B is the hormone.
(2) A and B in cold environment hormones in the blood content,
Role in skeletal muscle and other organizations, is the cause of Y thermogenesis .
(3) under normal temperature, A have increased in the blood, TRH and TSH Will secrete quantity, this belongs to adjust adjustment.
(4) in a cold environment, if the dress is too little, there will be a X thermogenesis, this The body appear the phenomenon is so Make the heat generated by the multiply.
(5) from the hypothalamus to B play a role, the adjustment way is
54, (4) some ecologists to \"protection and utilization of grassland ecological system\" as the subject, several research projects of the grasslands, and draw the following two figure. Among them: a diagram representing a rat group moved to a new ecosystem of population growth curve; B figure said FangMuLiang and producer of net output per unit area, the relationship between the dotted line in the graph represent not when grazing, producers in grassland net production, please according to the figure analysis and answer the following questions:
(1) compared with forest ecosystem, grassland ecosystem its self-regulation is small, the reason is. (2) a diagram, said the most likely due to the kind of inner struggle and limit the number of mice growth curve segment is.
(3) appropriate FangMuLiang control in b figure between b and c, why?
(4) if the prairie ecosystem FangMuLiang in b c points in the figure above, for a long time can cause what consequences?
55. (7 points) on the right to kill germs, the schematic diagram of phagocytic cells, according to the figure, please answer:
(1) the phagocytosis of phagocytes to bacteria and cell membranes There is a close relationship, the process as part of the immune.
Diction in the humoral immune, phagocytes after engulf bacteria, also can to deal with it, Expose the peculiar to the pathogen antigens (antigenic determinant), handed over And, make the latter differentiation and.
When the bacteria get inside cells, would be attacked.
56. (5) research on plant phototropism reason has a long history, please answer related questions according to the following facts:
(1) according to the 1920 s scientists, auxin (IAA) in the light and backlight on both sides of the distribution was the cause of phototaxis. So, this kind of distribution, is because the single light damage to the light side of IAA, and IAA in to light and backlight redistribution on both sides? Someone to do the experiment as shown in the figure below:
In A, B, C, D four experiments, _______ can be used to illustrate one light does not damage to the light side of IAA; _____ can be used to illustrate one light lateral redistribution of IAA. Thus can form a corollary: plant phototropism is a result of ______________________________________________________. Several kinds of plant phototropism organ distribution of IAA plant
IAA distribution (%)
To the light side Backlight side a. 50.0 50.0 B 50.2 49.8 C 50.1 49.9 D 49.5 50.5
(2) since the 1980 s, some scientists in the research of the plant phototropism and won the new progress on the issue. They use a more sophisticated method for determining several plant phototropism organs to the light side and back side of IAA content, the result shown in the table below:
At the same time, they also found that several plant phototropism organ to the light side of the
\"certain substances concentration significantly higher than the backlight side.\" According to the above two facts speculate that for this a few kinds of plants, the phototropism was due to the light side of the \"certain substances have the function of the ____________ holdhat the new corollary: the production of the plant phototropism also related to the ________________________.
57. (8) nutrition of the food chain and food web is ecosystem structure, material circulation and energy flow of ecosystem was conducted along the channel.
If in a temperate grassland food web as shown in the figure below. Please answer the analysis: (1) in the composition of the ecological system, belong to the grass, belongs to the owl, the rabbit in the first trophic level.
In a variety of organisms (2) the food web, contains one of the most energy is, the ecological system of energy source is in the end.
(3) in the material cycle of ecosystem, the carbon to form the biological communities and inorganic environment circulation, producers by carbon element into the biological community, through various kinds of function return carbon to inorganic environment.
(4) known each trophic level between the energy conversion efficiency of 10%, if a creature feeding the next trophic level of two kinds of creatures, and they are feeding the biomass are equal, the owl every 10 kg increase biomass, takes the producer Kilograms.
2007-2008 school year curriculum of the final synthetic test for high schools are Refer to the answer
A, single topic selection (1 point per question)
01-05 CCBDB 6-10 CDBCB 11-15 BAACB 16-20 BBADD 21-25 CCDCA 26-30 ACCAA 31-35 BACDA 36 -- 40 BDDDA 41-45 ABDAB 46-50 BBBCB Second, the short answer 51. (7 points)
(1) the chromosome variation; Genetic recombination (2) a; A quarter
(3) continuous selfing
(4) inhibition of spindle formation (5) mutation breeding 52. (11)
(1) (1); Often (2 Aa; Aa (3) 3/8
(2) (1) restriction; A kind of restriction enzymes can only base sequence of specific cutting (2) transcription; Reverse transcription. DNA nucleotides; Reverse transcriptase 53, (8)
(1), thyroid stimulating hormone releasing hormone adrenaline
(2) the rise in Promote metabolism, accelerate the body material of oxidation decomposition speed, thereby increasing production of heat (3) reduce the feedback regulation
(4) skeletal muscle involuntary shudder
(5) neural and humoral regulation adjustment 54, (4)
(1) the nutrition of grassland ecosystem structure is simple but few species (or nutritional structure)
(2) CD
(3) can not only maintain the stability of grassland ecological system, and can obtain higher animal husbandry production
(4) the grassland degradation, serious will cause of grassland desertification 55. (7 points)
(1) liquidity nonspecific immunity
(2) the effect of T cells, B cells (plasma cells) memory B cells effect T cells. 56. (5 points)
(1) A and B, C and D backlight side IAA than to the light side (or IAA in to light and backlight unevenly distributed on both sides)
(2) the inhibition of growth To the light side growth inhibitor than backlight side (or growth inhibitor in the light and backlight on both sides of the distribution) 57. (8) (1) producers to consumers (2) the grass light
(3) CO2 photosynthetic breathing (or gas) (4), 5500
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