Question

If a flower lacked a megasporangium, what type of gamete would not form? If the flower lacked a microsporangium, what type of gamete would not form?

Short answer

An egg would not form without a megasporangium, and pollen would not form without a microsporangium.

Step-by-step solution

Introduction

Angiosperms

They're heterosporous in nature. As a result, microspores, which create pollen grains as male gametophytes, and megaspores, which form an ovule with female gametophytes, are produced.

Explanation

Male sporocytes divide during meiosis inside the microsporangia of the anther to form haploid microspores. Haploid microspores undergo mitosis to produce pollen grains.

A generative cell that will divide into two sperm and a pollen tube cell make up each pollen grain.

Explanation

Inside each microsporangium, a diploid megasporocyte undergoes meiotic division. As a result, four haploid spores are produced. Among the four spores, only the large megaspore survives which splits three times mitotically to produce eight nuclei that are disseminated throughout the seven cells of the female gametophyte or embryo sac.

Explanation

If megasporangium is absent, there would be no egg cell formation.

If microsporangium is absent, there would be no pollen grain formation.