A large number of microspores are produced by…….in each pollen sacs of anther of angiosperm plants.
a) mitosis
b) binary fission
c) meiosis
d) all of these
Explanation: the wall of microspore becomes thick and is known as pollen grain
The pollen grain develops into……..
a) male gametophyte
b) diploid sporophyte
c) female gametophyte
d) haploid sporophyte
Explanation: also called microgametophyte
The nucleus of the pollen grain divides into …….nuclei.
a) two
b) three
c) four
d) five
Explanation: 1. Generative nucleus and 2. Vegetative nucleus or tube nucleus
The generative nucleus of pollen grain divides into…….male gametes (sperms).
a) two
b) three
c) four
d) five
Explanation: 1. One sperm fuses with egg to form zygote and other with fusion nucleus forming endosperm
The carpel in angiosperm plant’s flower consists of a basal swollen part called…
a) ovary
b) stigma
c) style
d) anther
Ovary of the carpel in angiosperm flower contains one or many……..
a) eggs
b) nuclei
c) ovules
d) fusion nuclei
