Sexual Reproduction in Flowering Plants · Question 28

A typical angiosperm embryo sac at maturity is :

1. 8-nucleate and 8-celled
2. 8-nucleate and 7-celled
3. 7-nucleate and 8-celled
4. 7-nucleate and 7-celled

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

1. Rosaceae : Leguminosae
2. Poaceae : Rosaceae
3. Poaceae : Leguminosae
4. Poaceae : Solanaceae

The body of the ovule is fused with the funicle at

1. Chalaza
2. Hilum
3. Micropyle
4. Nucellus

The plant parts which consist of two generations - one within the other

1. (i) and (iv)
2. (i) only
3. (i), (ii) and (iii)
4. (iii) and (iv)

In water hyacinth and water lily, pollination takes place by :

1. Insects and water
2. Water currents only
3. Insects or wind
4. Wind and water

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

1. Central cell develops into endosperm
2. Ovules develop into embryo sac
3. Ovary develops into fruit
4. Zygote develops into embryo

Persistent nucellus in the seed is known as

1. Hilum
2. Tegmen
3. Chalaza
4. Perisperm

What is the fate of the male gametes discharged in the synergid?

1. One fuses with the egg, other(s) fuse(s) with synergid nucleus.
2. One fuses with the egg and other fuses with central cell nuclei.
3. One fuses with the egg, other(s) degenerate(s) in the synergid.
4. All fuse with the egg.

Which of the following has proved helpful in preserving pollen as fossils?

1. Pollenkitt
2. Cellulosic intine
3. Oil content
4. Sporopollenin

Winged pollen grains are present in

1. Mustard
2. Cycas
3. Mango
4. Pinus