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Angiosperm Reproduction: Sexual Differentiation and Pollen Development

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Angiosperm Reproduction: Sexual Differentiation and Pollen Development

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Questions and Answers

What happens to the germ cell in a mature pollen grain?

It degenerates and disappears

It divides by meiosis to produce four haploid cells

It divides by mitosis to produce two sperm cells (correct)

It remains as a single cell

Which of the following is NOT a common method of pollination?

Wind pollination

Mammal pollination (correct)

Water pollination

Insect pollination

What is the purpose of the micropyle in the ovule structure?

To provide nutrients to the developing embryo

To allow the ovule to attach to the placenta

To allow the pollen tube to enter the ovule (correct)

To release the mature pollen grains from the anther

Which of the following is NOT a characteristic of wind-pollinated flowers?

Pollen that is large, barbed, and sticky Signup and view all the answers

How many nuclei are present in a mature embryo sac?

7 Signup and view all the answers

What type of angiosperms have separate male and female flowers on the same individual plant?

Monoecious Signup and view all the answers

What is the structure within which numerous diploid pollen mother cells are found during anther development?

Pollen sac Signup and view all the answers

Which part of the pollen grain is composed of sporopollenin, making it waterproof?

Exine Signup and view all the answers

What is the name for the groups of four spherical microspores that develop immediately after meiosis in anther development?

Tetrad Signup and view all the answers

What is the function of the tapetum cells surrounding the mother pollen cells in anther development?

Transfer nutrients to developing pollen Signup and view all the answers