Question 1

Which of the following best describes the fate of the generative cell of the pollen grain?

Accepted Answer

The answer of Which of the following best describes the...

Question 2

Describe egg formation in angiosperms, beginning with the sporophyte.

Accepted Answer

The answer of Describe egg formation in angiosperms, beginning with...

Question 3

When is asexual reproduction beneficial to plants? Under what conditions is sexual reproduction beneficial?

Accepted Answer

The answer of When is asexual reproduction beneficial to plants?...

Question 4

Which of the following is not a part of an angiosperm seed?

Accepted Answer

The style is a part of the female reproductive system of angiosperms, but it is not a component of the seed itself. The other options - seed coat, cotyledon, shoot apex, and endosperm - are all structures that are typically found within the seed of an angiosperm plant.

Question 5

In the transition from vegetative growth to floral growth the _______ must be transformed into the _______. This involves a shift from _______ growth to _______ growth.

Accepted Answer

In the transition from vegetative growth to floral growth, the apical meristem must be transformed into the floral meristem. This involves a shift from indeterminate growth (where the plant grows continuously) to determinate growth (where the plant stops growing after reaching a specific size). The apical meristem is responsible for the indeterminate growth of the plant, while the floral meristem is responsible for the determinate growth of the flower.

Question 6

The LEAFY and APETALA1 genes are examples of _______ genes.

Accepted Answer

LEAFY and APETALA1 are meristem identity genes, which play a crucial role in the transition of the meristem from vegetative to floral development in plants.

Question 7

Most wine grape vines are grafted onto rootstock of another species. How does this practice increase grape yields?

Accepted Answer

Grafting wine grape vines onto rootstock of another species can increase grape yields for multiple reasons. A hardy and disease-resistant rootstock can replace a weak rootstock and provide better support for the vine. A high-producing vine stock can also replace a low-producing vine stock, leading to increased yields. Additionally, vintners can select for pest resistance without sacrificing grape quality by using different rootstocks. Therefore, all of the above options are valid reasons for why grafting can increase grape yields.

Question 8

Flowering is stimulated when light sets off a gene cascade. Explain how this may be hormonally controlled.

Accepted Answer

The answer of Flowering is stimulated when light sets off...

Question 9

The production of seeds without fertilization is called

Accepted Answer

The production of seeds without fertilization is called apomixis. This process involves the formation of embryos from cells of the ovule without the need for meiosis or fertilization.

Question 10

Which of the following is not part of a megagametophyte?

Accepted Answer

Pollen grain is part of the male gametophyte, not the megagametophyte. Synergids, antipodal cells, and polar nuclei are all part of the megagametophyte.

Question 11

You notice that a new houseplant sends out long stems with what look like "little plants" attached. You allow one of these to rest in a cup of water and note that roots form. This is an example of

Accepted Answer

The production of new individuals from a single parent without the involvement of gametes is known as asexual reproduction. In this case, the plant is sending out long stems with "little plants" attached, which are likely new plantlets formed through a form of asexual reproduction known as vegetative reproduction. The formation of roots in the cup of water further supports this idea.

Question 12

Identify the following structures as occurring in the sporophyte or gametophyte generation.
a. Embryo sac: _______
b. Antipodal cells: _______
c. Polar nuclei: _______
d. Integument: _______
e. Receptacle: _______
f. Ovary: _______
g. Anther: _______
h. Pollen grain: _______

Accepted Answer

The answer of Identify the following structures as occurring in...

Question 13

The induction of flowering by means of exposure to low temperature is called

Accepted Answer

The induction of flowering by exposure to low temperature is called vernalization. This process is essential for many temperate plants to flower in the spring after experiencing cold temperatures during the winter.

Question 14

Much effort is spent detasseling corn (removing male flowers). Why doesn't it work simply to spray the corn plants with a meiosis inhibitor to halt pollen production? (Hint: Male and female flowers occur on the same corn plant.)

Accepted Answer

The answer of Much effort is spent detasseling corn (removing...

Question 15

Describe double fertilization. What is the ploidy level of the products of double fertilization?

Accepted Answer

The answer of Describe double fertilization. What is the ploidy...

Question 16

Self-pollination in plants that produce both pollen and eggs is prevented by

Accepted Answer

Self-pollination is prevented by self-incompatibility genes, physical barriers, and the production of pollen and eggs at different times, making all the options correct.

Question 17

During double fertilization two sperm cells fuse (one each) with

Accepted Answer

During double fertilization in angiosperms, one sperm cell fuses with the egg cell to form a zygote, while the other sperm cell fuses with the two polar nuclei to form endosperm. Therefore, both choices a and b are correct, making option D the best choice. Choice c is incorrect as the sperm cells are already present inside the pollen grain before fertilization occurs.

Question 18

The shoot apex and the root apex appear during the _______ stage of embryo development.

Accepted Answer

The shoot apex and root apex appear during the torpedo stage of embryo development, where the embryo elongates and differentiates into distinct regions.

Question 19

Define a fruit. Which of the following are fruits: tomato, pear, potato, banana, cucumber, snow pea, peanut, sunflower seed?

Accepted Answer

The answer of Define a fruit. Which of the following...

Question 20

Compare and contrast asexual and sexual reproduction in plants. In which category does self-fertilization belong?

Accepted Answer

The answer of Compare and contrast asexual and sexual reproduction...

Quiz 38: Reproduction in Flowering Plants

Which of the following best describes the fate of the generative cell of the pollen grain?

Describe egg formation in angiosperms, beginning with the sporophyte.

When is asexual reproduction beneficial to plants? Under what conditions is sexual reproduction beneficial?

Which of the following is not a part of an angiosperm seed?

In the transition from vegetative growth to floral growth the ___ must be transformed into the _. This involves a shift from _ growth to ___ growth.

The LEAFY and APETALA1 genes are examples of _______ genes.

Most wine grape vines are grafted onto rootstock of another species. How does this practice increase grape yields?

Flowering is stimulated when light sets off a gene cascade. Explain how this may be hormonally controlled.

The production of seeds without fertilization is called

Which of the following is not part of a megagametophyte?

You notice that a new houseplant sends out long stems with what look like "little plants" attached. You allow one of these to rest in a cup of water and note that roots form. This is an example of

Identify the following structures as occurring in the sporophyte or gametophyte generation. a. Embryo sac: ___ b. Antipodal cells: _ c. Polar nuclei: _ d. Integument: _ e. Receptacle: _ f. Ovary: _ g. Anther: _ h. Pollen grain: ___

The induction of flowering by means of exposure to low temperature is called

Much effort is spent detasseling corn (removing male flowers). Why doesn't it work simply to spray the corn plants with a meiosis inhibitor to halt pollen production? (Hint: Male and female flowers occur on the same corn plant.)

Describe double fertilization. What is the ploidy level of the products of double fertilization?

Self-pollination in plants that produce both pollen and eggs is prevented by

During double fertilization two sperm cells fuse (one each) with

The shoot apex and the root apex appear during the _______ stage of embryo development.

Define a fruit. Which of the following are fruits: tomato, pear, potato, banana, cucumber, snow pea, peanut, sunflower seed?

Compare and contrast asexual and sexual reproduction in plants. In which category does self-fertilization belong?

Quiz 38: Reproduction in Flowering Plants

Which of the following best describes the fate of the generative cell of the pollen grain?

Describe egg formation in angiosperms, beginning with the sporophyte.

When is asexual reproduction beneficial to plants? Under what conditions is sexual reproduction beneficial?

Which of the following is not a part of an angiosperm seed?

In the transition from vegetative growth to floral growth the _______ must be transformed into the _______. This involves a shift from _______ growth to _______ growth.

The LEAFY and APETALA1 genes are examples of _______ genes.

Most wine grape vines are grafted onto rootstock of another species. How does this practice increase grape yields?

Flowering is stimulated when light sets off a gene cascade. Explain how this may be hormonally controlled.

The production of seeds without fertilization is called

Which of the following is not part of a megagametophyte?

You notice that a new houseplant sends out long stems with what look like "little plants" attached. You allow one of these to rest in a cup of water and note that roots form. This is an example of

Identify the following structures as occurring in the sporophyte or gametophyte generation. a. Embryo sac: _______ b. Antipodal cells: _______ c. Polar nuclei: _______ d. Integument: _______ e. Receptacle: _______ f. Ovary: _______ g. Anther: _______ h. Pollen grain: _______

The induction of flowering by means of exposure to low temperature is called

Much effort is spent detasseling corn (removing male flowers). Why doesn't it work simply to spray the corn plants with a meiosis inhibitor to halt pollen production? (Hint: Male and female flowers occur on the same corn plant.)

Describe double fertilization. What is the ploidy level of the products of double fertilization?

Self-pollination in plants that produce both pollen and eggs is prevented by

During double fertilization two sperm cells fuse (one each) with

The shoot apex and the root apex appear during the _______ stage of embryo development.

Define a fruit. Which of the following are fruits: tomato, pear, potato, banana, cucumber, snow pea, peanut, sunflower seed?

Compare and contrast asexual and sexual reproduction in plants. In which category does self-fertilization belong?

In the transition from vegetative growth to floral growth the ___ must be transformed into the _. This involves a shift from _ growth to ___ growth.

Identify the following structures as occurring in the sporophyte or gametophyte generation. a. Embryo sac: ___ b. Antipodal cells: _ c. Polar nuclei: _ d. Integument: _ e. Receptacle: _ f. Ovary: _ g. Anther: _ h. Pollen grain: ___