41. Match List-I (Mutants described by de Vries) with List-II (Characters) and select the correct answer:
List-I
List-II
a. Progressive species
1. Plants which did not breed true but produced mutants like the parent
b. Regressive species
2. Species with weak structures which will become extinct ultimately
c. Degressive species
3. Species with loss of some characters
d. Inconstant species
4. Species with additional characters
| List-I | List-II |
| a. Progressive species | 1. Plants which did not breed true but produced mutants like the parent |
| b. Regressive species | 2. Species with weak structures which will become extinct ultimately |
| c. Degressive species | 3. Species with loss of some characters |
| d. Inconstant species | 4. Species with additional characters |
42. Study the following statements.
1. Evolutionary development of a species can be best studied by studying fossils of these species.
2. Human evolution originated in Africa.
3. Wings of pigeon, bat and mosquito exhibit the phenomenon called Convergent Evolution.
Which of the statements given above is/are correct?
1. Evolutionary development of a species can be best studied by studying fossils of these species.
2. Human evolution originated in Africa.
3. Wings of pigeon, bat and mosquito exhibit the phenomenon called Convergent Evolution.
Which of the statements given above is/are correct?
43. Consider the following statements.
1. Allosomes, i.e. chromosomes which are responsible for determination of sex e.g. X and Y chromosomes.
2. Autosomes, i.e. chromosomes, which determine the somatic characters.
Which of the statement(s) given above is/are true?
1. Allosomes, i.e. chromosomes which are responsible for determination of sex e.g. X and Y chromosomes.
2. Autosomes, i.e. chromosomes, which determine the somatic characters.
Which of the statement(s) given above is/are true?
44. Coacervates belongs to the category of
45. Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?
46. Consider the following statements regarding the embryological evidences for evolution and choose the correct answer:
1. Algae are much advanced than mosses and ferns
2. Protonema of mosses resemble certain green algae
3. Both bryophytes and pteridophytes have ciliated sperms and require water for fertilization
4. Gymnosperms do not need water for fertilization
5. Cycads and Gingko, the primitive gymnosperms, have ciliated sperms like the pteridophytes
1. Algae are much advanced than mosses and ferns
2. Protonema of mosses resemble certain green algae
3. Both bryophytes and pteridophytes have ciliated sperms and require water for fertilization
4. Gymnosperms do not need water for fertilization
5. Cycads and Gingko, the primitive gymnosperms, have ciliated sperms like the pteridophytes
47. Which of the following together form a nucleotide?
48. Darwin believed that the certain parts of the body get larger through the generation. They
49. Haemophilia is mostly associated with
50. According to recent proof, the life on earth emerged approximately
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