Question 1

Alternation of generations means that a diploid sporophyte produces haploid spores by meiosis and a haploid gametophyte produces gametes by mitosis.

Accepted Answer

Alternation of generations means that a diploid sporophyte alternates with a haploid gametophyte.

Question 2

Which of the following statements is NOT true about flowering plants?

Accepted Answer

The ovules are the female part of the plant and contain the megaspore mother cell.

Question 3

A flower that is missing the stamens would be considered female.

Accepted Answer

The stamens are the "male" portion of the flower.

Question 4

Which of the following statements is NOT correct about flowering plants?

Accepted Answer

The sperm nucleus combines with the two polar nuclei to form the endosperm.

Question 5

Which of the following is NOT a component of the carpel of a flower?

Accepted Answer

The anther is part of the stamen (male) part of the flower.

Question 6

Cross-pollination occurs when pollen from an anther of one plant is transferred to the stigma of another plant of the same species.

Accepted Answer

Pollination is the transfer of pollen from an anther to a stigma. Cross pollination would involve two different plants.

Question 7

You find a plant that appears to contain stamens and carpels but no petals or sepals.What could you conclude about this "flower"?

Accepted Answer

Without petals and carpels to attract a pollinator, the plant is most likely pollinated by the wind. Since it has both male and female parts it is not sterile or dioecious. Gametophytes do not produce flowers. A flower missing petals and carpels would be incomplete.

Question 8

How many nuclei are present inside a pollen grain?

Accepted Answer

The pollen grain contains three nuclei: the two sperm nuclei and the tube cell nucleus.

Question 9

What flower mechanism would not help prevent pollination by a foreign plant species?

Accepted Answer

Flowers that all bloom at the same time with similar flowers would have a difficult time preventing cross pollination.

Question 10

Fertilization in flowering plants occurs

Accepted Answer

Fertilization occurs when the sperm reaches the ovule and joins with the egg and polar nuclei.

Question 11

Which statement is NOT true about the life cycle of flowering plants?

Accepted Answer

The female gametophyte is the embryo sac. The seed comes from the zygote.

Question 12

Which of the following is not part of the female portion of the flower?

Accepted Answer

The female part of the flower is the carpel or pistil, composed of the stima, style, and ovary.

Question 13

What accounts for the attractiveness of many flowers that helps enhance their reproductive opportunities?

Accepted Answer

The petals of a flower are usually the showy, colorful part of the flower. This is what will often attract a pollinator to the flower.

Question 14

Double fertilization in an angiosperm produces

Accepted Answer

Double fertilization results in a diploid zygote (one sperm and one egg) and a triploid endosperm (one sperm and the 2 polar nuclei).

Question 15

The megaspore divides mitotically,resulting in a female gametophyte or embryo sac that differentiates into an egg and a central cell with two nuclei called the

Accepted Answer

The two nuclei within the central cell of the mature female gametophyte are called polar nuclei. This will develop into the endosperm.

Question 16

The male gametophyte in flowering plants will be found within the

Accepted Answer

The pollen grain is the male gametophyte which produces the sperm.

Question 17

The pollen grain contains the

Accepted Answer

The pollen grain is the male gametophyte and contains the sperm.

Question 18

Which of the following is NOT a part of a flower?

Accepted Answer

The stem of a plant is a vegetative, not a reproductive structure.

Question 19

Hemp (Cannabis sativa)is a dioecious plant.This means that the flowers of hemp

Accepted Answer

A dioecious plant means that the staminate and carpellate flowers are on separate plants. Therefore the flowers are incomplete.

Question 20

When you pick a bouquet of anther-less flowers,you have picked

Accepted Answer

In flowering plants, the female gametophytes are retained within the body of the sporophyte.

Quiz 10: Plant Reproduction and Responses