Sexual Reproduction in Flowering Plants — Page 11 | NEET Biology

Q101

Which of the following statements is not true about somatic embryogenesis?

A A somatic embryo develops from a somatic cell

B The pattern of development of a somatic embryo is comparable to that of a zygotic embryo

C Somatic embryos can develop from microspores

D Somatic embryo is induced usually by an auxin such as 2, 4-D

Correct Answer

Option C

Solution

(c) Somatic embryos develop from somatic cells, not microspores (which would be androgenesis).

Q102

Albuminous seeds store their reserve food mainly in the

A Perisperm

B Endosperm

C Cotyledons

D Hypocotyl

Correct Answer

Option B

Solution

(b) Albuminous seeds retain endosperm as food reserve (e.g., wheat, maize, castor).

Q103

The viability of seeds is tested by

A Safranine

B 2,6 dichlorophenol indophenols

C 2,3,5 triphenyl tetrazolium chloride

D DMSO

Correct Answer

Option C

Solution

(c) Tetrazolium chloride stains living tissue red by reacting with dehydrogenases — viability test.

Q104

Perisperm differs from endosperm in

A having no reserve food

B being a diploid tissue

C its formatting by fusion of secondary nucleus with several sperms

D being a haploid tissue

Correct Answer

Option B

Solution

(b) Perisperm is diploid (2n) nucellus remnant; endosperm is triploid (3n).

Q105

Non-albuminous seed is produced in

A Maize

B Castor

C Wheat

D Pea

Correct Answer

Option D

Solution

(d) Pea is exalbuminous (non-endospermic); food stored in cotyledons.

Q106

Functional megaspore in an angiosperm develops into

A Endosperm

B Embryo sac

C Embryo

D Ovule

Correct Answer

Option B

Solution

(b) The functional megaspore undergoes 3 mitotic divisions to form the 8-nucleate embryo sac.

Q107

Persistent nucellus in the seed is known as

A Chalaza

B Perisperm

C Hilum

D Tegmen

Correct Answer

Option B

Solution

(b) Perisperm: persistent nucellus remaining in the seed (e.g., black pepper, beet).

Q108

Which one of the following statements regarding post-fertilisation development is incorrect?

A Ovary develops into fruit.

B Zygote develops into embryo.

C Central cell develops into endosperm.

D Ovules develop into embryo sac.

Correct Answer

Option D

Solution

(d) Post-fertilization: ovules → seeds (not embryo sac); embryo sac is a pre-fertilization structure.

Q109

Parthenogenesis is

A development of embryo without fertilization

B development of fruit without fertilization

C development of fruit without hormones

D development of embryo from egg without fertilization

Correct Answer

Option D

Solution

(d) Parthenogenesis: development of embryo from unfertilized egg.

Q110

Tegmen develops from

A funiculus

B chalaza

C inner integument

D outer integument

Correct Answer

Option C

Solution

(c) Tegmen (inner seed coat) develops from inner integument; testa from outer integument.