Question 1

In Vorticella, the total number of micronuclei formed at the end of pre-zygotic nuclear division in female gamont is:

Accepted Answer

Correct answer is A

Question 2

Which one of the following glands is absent in reproductive systern of rabbit?

Accepted Answer

Correct answer is B

Question 3

Haploid parthenogenesis among insects is shown by order:

Accepted Answer

Correct answer is A

Question 4

A person which shows the secondary sexual characters of both male and fernale is called:

Accepted Answer

Correct answer is D

Question 5

Gemmule formation in sponges is helpful in:

Accepted Answer

Correct answer is D

Question 6

Product of sexual reproduction generally genetates:

Accepted Answer

Correct answer is D

Question 7

Which is mode of reproduction in Amoeba?

Accepted Answer

Binary fission may be longitudinal or transverse. During multiple fission, the parental body divides into many daughter organisms.

Question 8

In Earthworms, self fertilization does not occur due to:

Accepted Answer

Earthworms are bisexual but self fertilization does not occur because their testes ripes first. They are protandrous.

Question 9

Binary fission is found in:

Accepted Answer

Binary fission occurs in Amoebo, Paramecium, and Planaria.

Question 10

Drones in a colony of honey bees originate by:

Accepted Answer

Arthenotoky is a type of parthenogenesis, in which the unfertilized eggs develop into males with haploid cells.

Question 11

Which of the following shows the sexual dirnorphism?

Accepted Answer

Correct answer is D

Question 12

Arthenotoly is related to:

Accepted Answer

Parthenogenesis can be classified into arrhenotoky and thelytolty.

Question 13

Fertilization is internal in:

Accepted Answer

Correct answer is C

Question 14

Natural parthenogenesis occurs in:

Accepted Answer

Parthenogenesis is the development of an individual from an unfertilized egg. In honey bees drones develop parthenogenetically.

Question 15

Which tupe of reproduction is found in Hydra?

Accepted Answer

Both sexual and asexual type of reproduction are found in Hydra.

Question 16

Apomixis in plant means development of a plant:

Accepted Answer

Correct answer is B

Question 17

Consider the following statements and choose the correct option.(i) The genetic constitution of a plant is unaffected in vegetative propagation(ii) Rhizome in ginger serves as an organ of vegetative reproduction(iii) Totipotency of cells enables us to micropropagate plants

Accepted Answer

Correct answer is D

Question 18

Veqetative propagation in mint oceurs by:

Accepted Answer

Correct answer is D

Question 19

The part which is grafting on stalk of another tree is called:

Accepted Answer

Correct answer is D

Question 20

Vegetative propagation in Pista occurs by:

Accepted Answer

Correct answer is B

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Solution for Class 12, Biology, Reproduction in Organisms

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