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17
MCQ (Single Correct Answer)

In the embryos of a typical dicot and a grass, true homologous structures are

A

coleorrhiza and coleoptile

B

coleoptile and scutellum

C

cotyledons and scutellum

D

hypocotyl and radicle

18
MCQ (Single Correct Answer)

The phenomenon observed in some plants where in parts of the sexual apparatus is used for forming embryos without fertilisation is called

A

parthenocarpy

B

apomixis

C

vegetative propagation

D

sexual reproduction

19
MCQ (Single Correct Answer)

In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be

A

haploid

B

diploid

C

a few haploid and a few diploid

D

with varying ploidy

20
MCQ (Single Correct Answer)

The phenomenon wherein, the ovary develops into a fruit without fertilisation is called

A

parthenocarpy

B

apomixis

C

asexual reproduction

D

sexual reproduction

21

Name the component cells of the 'egg-apparatus' in an embryo sac.

Explanation

The component cells of the 'egg-apparatus' in an embryo sac include, two synergids, one egg cell and the filiform apparatus.