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Angiosperm Reproduction Questions

(answers WAY DOWN at bottom of page)

A. After pollination, which of the following events is crucial for fertilization?

1. Sperm swim to the egg and the polar nuclei
2. Petals close around the reproductive parts
3. Meiosis occurs within the pollen grain
4. A pollen tube grows from the stigma to the ovule
5. An insect delivers pollen to the stigma

B. After fertilization of the egg, the ovule wall (integument) develops into the

1. cotyledons
2. embryo
3. endosperm
4. fruit
5. seed coat

C. Which of the following is a gametophyte of a flowering plant?

1. Flower
2. Egg
3. Pollen grain
4. Anther
5. Entire plant

D. The female gametophyte of flowering plants consists of the

1. pollen grain.
2. pollen tube.
3. eight-nucleate embryo sac.
4. ovule
5. megasporangium and cells within it.

E. Within which of the following structures does meiosis occur?

1. Petal
2. Ovule
3. Stigma
4. Sepal
5. Pollen grain

F. An advantage of self-fertilization in plants is

1. increased genetic recombination.
2. that meiosis can occur.
3. greater efficiency of pollination
4. that no flowering is needed.
5. that only asexual reproduction is necessary.

G. Where does fertilization occur in flowering plants?

1. Where pollen lands on the stigma
2. Where the pollen tube germinates
3. Inside the pollen tube
4. At the base of the embryo sac
5. Inside the seed

H. What is the fate of the seven cells of the embryo sac?

1. All but one disintegrate upon fertilization.
2. Two become fertilized; the others disintegrate.
3. Two become fertilized; the others fuse to form endosperm.
4. All are involved in nuclear fusion events.
5. They all become part of the seed tissue.

I. The fruit develops from which part of the flower?

1. Petals
2. Sepals
3. Ovary
4. Stamens
5. Pedicel

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Answers: A4, B5, C3, D3, E2, F3, G4, H2, I3