If there are 4 microspore mother cells in an anther, what will be the number of pollen grains?

• 4

• 8

• 12

• 16

After double fertilisation, a mature ovule has

• I diploid and I haploid cell

• 1 diploid and I triploid cell

• 2 haploid and I triploid cell

• 1 haploid and I triploid cell

Identify the parts labelled A, B, C and D in the given figure and select the correct option.

• A- Scutellum, B- Epiblast, C- Coleoptile, D- Coleorhiza

• A- Scutellum, B- Coleorhiza, C- Coleoptile, D- Epiblast

• A- Scutellum, B- Coleoptile, C- Coleorhiza, D- Epiblast

• A- Epiblast, B- Coleoptile, C- Coleorhiza, D- Scutellum

Match column I with column II and select the correct option from the given codes.

Column I	Column II
A. Parthenocarpy	(i) Seed formation without fertilisation
B. Polyembryony	(ii) More than one embryo in same seed
C. Apomixis	(iii) Seedless fruits without fertilisation
D. Somatic embryogenesis	(iv) Embryo develops from a somatic cell

• A- (iv), B- (ii), C- (iii), D- (i)

• A- (iii), B- (ii), C- (i), D- (iv)

• A- (i), B- (iv), C- (iii), D- (ii)

• A- (ii), B- (iii), C- (i), D- (iv)

What is the correct sequence of the formation of female gametophyte in angiosperms

• Nucellus, megapore tetrad, megaspore mother cell, megaspore, female gametophyte

• Megaspore tetrad, nucellus, megaspore mother cell, megaspore, female gametophyte

• Nucellus, megaspore mother cell, megaspore tetrad, megaspore, female gametophyte

• Megaspore mother cell, megaspore tetrad, megaspore, nucellus, female gametophyte

116.

Primary endosperm nucleus (PEN) is formed by the fusion of

• 2 polar nuclei + I synergid cell nucleus

• I polar nucleus + I antipodal cell nucleus + I synergid cell nucleus

• 2 polar nuclei+ I male gamete nucleus

• 2 antipodal cell nuclei + I male gamete nucleus

Tetradynamous condition is found in

• Hibiscus rosa-sinesis

• Ocimum sanctum

• Helianthus annuus

• Brassica campestris

Apomixis is

• formation of seeds by fusion of gametes

• formation of seeds without syngamy and meiosis

• formation of seeds with syngamy but no meiosis

• none of the above

The following is the diagram of T.S. of anther. Identify the parts labelled A, B and C.

• A- Connective tissue, B- Pollen grain, C- Endothecium

• A- Endothecium, B- Connective tissue, C- Pollen grains

• A- Pollen grains, B- Connective tissue, C- Endothecium

• A- Endothecium, B- Pollen grains, C- Connective tissue

Assertion : Endothecium layer of anther wall plays an important role in dehiscence of anther.

Reason : The presence of fibrous bands and differential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false