11. The active repressor binds to the inducer molecule to form an R-I complex which results in
12. Evidence which favours the theory of acquired character are
1. Absence of limbs in snakes.
2. Presence of webbed toes in aquatic bird.
3. Lack of pigments in cave dwelling animals.
4. Darwin finches
5. Melanisation peppered moths
Choose the correct option.
1. Absence of limbs in snakes.
2. Presence of webbed toes in aquatic bird.
3. Lack of pigments in cave dwelling animals.
4. Darwin finches
5. Melanisation peppered moths
Choose the correct option.
13. The substitution or deletion of one, two or all of the nucleotides in a triplet alters the code which results in a
14. When crossing over occurs within the inverted segment of a paracentric inversion,
15. Which of the following situation would most likely result in the highest rate of natural selection?
16. The technique devised to produce vast quantities of strong and healthy plantlets by rapid vegetative multiplication under controlled conditions is known as
17. In farm yard manure the microorganisms decompose complex organic debris into a dark amorphous substance known as
18. . . . . . . . . of species is a reflection of their evolutionary relationship.
19. It is now held that the first cells in due course of abiogenesis gave rise to three equally ancient cell lines called
20. Aseptic seedlings are produced by surface sterilizing the seeds in
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