In angiosperm plant flower, The megaspore develops into…….celled female gametophyte.
a) seven
b) three
c) eight
d) five
Explanation: one egg or ovum, one fusion nucleus (2n) two synergid cells and remaining three antipodal cells. This structure is also known as embryo sac
Double fertilization in angiosperm flower means…….
a) fusion of two sperms with two eggs
b) fusion of two sperms with two fusion nuclei
c) fusion of two sperms with one egg and one fusion nucleus
d) fusion of two sperm with one egg
Explanation: it occurs only in angiosperms
Double fertilization occurs in…….
a) ferns
b) pine
c) maize
d) marchantia
In angiosperms, the oospore develops into an embryo which consists of ……..
a) a radical, hypocotyle and plumule
b) one or two cotyledons
c) both a and b
d) none of these
The fusion nucleus develops into a nutritive tissue called………
a) endospore
b) endosperm
c) cotyledon
d) zygote
Explanation: it is triploid (3n); 1n sperm+2n fusion nucleus
The integument of the ovule form ……..
a) the fruit
b) the testa
c) the seed
d) none of these
Explanation: also called seed coat
