Sexual Reproduction in Flowering Plants — Prelims Questions

A typical angiosperm embryo sac at maturity is:

Which of the following statements is INCORRECT regarding sporopollenin?

How many meiotic divisions are required to produce 100 pollen grains?

Which of the following is an example of an outbreeding device that prevents autogamy but not geitonogamy?

If the diploid chromosome number of a flowering plant is $2n = 36$, what would be the chromosome number in the endosperm?

Which part of the ovule develops into the seed coat after fertilization?