Free Sexual Reproduction In Flowering Plants (Daily Quiz: 8) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

PEC (Primary Endosperm Cell) is formed

(a) before triple fusion

(b) after triple fusion

(c) at the time of syngamy

(d) always persisted

Question-2

Function performed by the outer three layers of microsporangium?

(a) Provides nourishment to developing pollen

(b) Protection to developing pollen

(c) Helps in the dehiscence of anther to release pollen

(d) Both (b) and (c)

Question-3

Which one of the following statements is wrong?

(a) When pollen is shed at two¬celled stage, double fertilization does not take place.

(b) Pollen grains in some plants remain viable for months.

(c) Vegetative cell is larger than generative cell.

(d) Intine is made up of cellulose and pectin.

Question-4

Which of the following statement(s) is/are correct about self-incompatibility ?

1. It is a device to prevent inbreeding.
2. It provides a biochemical block to self-fertilization.
3. It ensures cross-fertilization.
4. It is governed by pollen-pistil interaction.
5. It is governed by series of multiple alleles.
6. It prevents self-pollen (from the same flower of other flowers of the same plant) from fertilizing the ovules by inhibiting pollen germination of pollen tube growth in the pistil.

(a) (i), (ii) and (iii)

(b) All of the above

(c) (i), (iv) and (v)

(d) None of the above

Question-5

Microspore tetrad (pollen grains) is the result of

(a) meiotic cell division

(b) mitotic cell division

(c) Both (a) and (b)

(d) None of these