Sexual Reproduction (15-04-23)

Diversity of structures of the inflorescences, flower and floral parts –

• (a) Are responsible for making our garden beautiful

• (b) Ensure self pollination

• (c) Are adaptations to ensure formation of end products of sexual reproduction

• (d) Ensure anemophily

Which of the following is false?

• (a) Flowers do not exist only for us to be used for our own selfishness

• (b) All flowering plants show sexual reproduction

• (c) Gymnosperms, being nonflowering, do not show sexual reproduction

• (d) Flowers are objects of aesthetic, ornamental, social, religious and cultural value

The proximal part of filament of stamen is attached to –

• (a) Thalamus or the petal

• (b) Sepals or thalamus

• (c) Pedicel or petiole

• (d) Ovary or ovule

Microsporangium is generally surrounded by 4 wall layers. Which of the following 3 wall layers perform the function of protection and help in the dehiscence of anther to release the pollen?

• (a) Epidermis, tapetum, endothecium

• (b) Epidermis, aril, endothecium

• (c) Epidermis, endodermis, mesocarp

• (d) Epidermis, middle layer and endothecium

• (a) Sporogenous tissue, tapetum, epidermis, middle layer, endothecium

• (b) Sporogenous tissue, epidermis, tapetum, middle layer, endothecium

• (c) Sporogenous tissue, epidermis, middle layer, tapetum, endothecium

• (d) Sporogenous tissue, tapetum, middle layer, epidermis, endothecium

As the anthers mature and dehydrate, the ______________ separate dissociate from each other and develop into

• (a) Megaspore, embryo sac

• (b) Microspores, pollen grains

• (c) Pollen grains, megaspores

• (d) Megaspores, microspores

otal number of nuclei involved in double fertilization is –

• (a) 2

• (b) 3

• (c) 4

• (d) 5

In double fertilization total number of male nuclei and total number of female nuclei involved are –

• (a) 3, 2 respectively

• (b) 2, 3 respectively

• (c) 2, 2 respectively

• (d) 3, 3 respectively

One meiosis produces how many male gametes –

• (a) 4

• (b) 2

• (c) 1

• (d) 8

Father of Indian embryology is –

• (a) P. Maheshwari

• (b) Swaminathan

• (c) R. Misra

• (d) Butler