Question

Select the correct statements from the following :
I. Endosperm is generally triploid in angiosperms.
II. All angiosperms have monosporic and endosporic embryo sac.
III. Angiosperms are characterised by double-fertilization.
IV. All angiosperms show-indirect pollination and siphonogamy.

• A. I, II and III
• B. II, III and IV
• C. I, III and IV
• D. I, II, III and IV

Answer 1

Answer: (C)

I, III and IV

In angiosperms, the male gametophyte produces two male gametes. As two male gametes take part and fertilization and fertilization takes place twice, this process is called double fertilization.

One male gamete fuses with the female gamete to form the zygote and the other fuses with the secondary nucleus to form the triploid endosperm. The pollen is deposited on the stigma.

The male gamete then reaches the ovule inside the ovary with the help of a pollen tube. This is called indirect pollination. Siphonogamy is the mode of reproduction in which non-motile male nuclei are carried to the egg cell through a pollen tube.

Thus the correct answer is option C.