Fertilization in Flowering Plants

A mature pollen grain contains a tube nucleus and a __________ nucleus.

The generative nucleus divides by mitosis to form two male gametes.

• True

• False

The pollen grain is transferred from the anther to the ______.

• style

• stigma

• ovary

• ovule

The pollen grain lands on the (a) _____​ , germinates to form a pollen tube which grows down the ​(b) _____ towards the (c) _____​ .

• stigma, ovule, style

• style, stigma, ovule

• stigma, style, ovule

The pollen tube penetrates the ovule through the _________.

One male gamete fertilizes the egg cell to form a ​_____ while the other male gamete fuses with the polar nuclei to form a ​_____.

• diploid zygote, triploid endosperm

• triploid endosperm, diploid zygote

The process mentioned in the previous question is known as ______ _____________.

Which of the following describes the importance of double fertilization in flowering plants?

(I) ensures genetic information is passed down from generation to generation

(II) produces genetically identical plants

(III) forms an endosperm which nourishes the embryo

(IV) forms a zygote which will develop into an embryo and subsequently a new plant

• (I), (II), and (III)

• (III), (IV)

• (I), (III), and (IV)

• All of the above