Question 1

The following sequence represents events in the development of a fruit:

Accepted Answer

Pollination is the transfer of pollen from the anther to the stigma. Fertilization occurs when the sperm from the pollen grain fertilizes the egg inside the ovule. The fertilized egg becomes an embryo that develops within the seed. As the embryo grows, the ovary surrounding the ovule matures and becomes a fruit. This sequence is represented in choice A.

Question 2

The correct arrangement of flower parts from the outside to the inside is:

Accepted Answer

The correct arrangement from the outside to the inside of a flower is sepals (outermost), petals, stamens, and carpels (innermost). Sepals protect the flower bud before it opens, petals are often colorful and attract pollinators, stamens are the male reproductive parts, and carpels are the female reproductive parts.

Question 3

Which of the following events must occur before fertilization can happen?

Accepted Answer

Pollination is the process by which pollen is transferred from the anther to the stigma of a flower, and it must occur before fertilization can happen.

Question 4

Which of the following is NOT part of the male reproductive parts of a flower?

Accepted Answer

The ovule is part of the female reproductive parts of a flower, not the male. The male reproductive parts consist of the anthers, which produce microspores that develop into pollen grains. The pollen grains contain the sperm cells that fertilize the egg cell within the ovule.

Question 5

How would you expect a mutation that prevents the production of small RNA molecules to affect the flowering of plants such as winter wheat,which normally flower in the spring after cold exposure?

Accepted Answer

Small RNA molecules are known to play a role in regulating gene expression during various biological processes, including flowering in plants. In the absence of small RNA molecules, the flowering of winter wheat, which normally occurs in the spring after cold exposure, is likely to be affected. Specifically, the lack of small RNA molecules is likely to delay or prevent the expression of the genes required for flowering, resulting in late or no flowering. Therefore, option C is the most likely outcome.

Question 6

Which one of the following is not a variation of flowers frequently considered in investigations of flowers and their functions?

Accepted Answer

The preferred soil conditions of a flower are not typically considered in investigations of their functions. The other options (fragrance, color, shape, and number of parts) all play important roles in attracting pollinators, aiding in reproduction, and differentiating between species.

Question 7

Capsaicin is a compound in chili peppers that produces a burning sensation in mammalian tissues.In mammals,capsaicin binds to the TRPV1 transmembrane channel.Interestingly,the TRPV1 channel in birds does not respond to capsaicin.What implications could this have for chili pepper plants?

Accepted Answer

The fact that birds do not respond to capsaicin suggests that they may be able to consume chili peppers without discomfort, making them more likely to eat and disperse the seeds. Therefore, birds are likely responsible for the dispersal of chili pepper seeds. Mammals may also consume chili peppers, but they are more likely to experience discomfort and may be less efficient at seed dispersal. Thus, option D is the best choice.

Question 8

As described in your book,many commercial flowers have extra whorls of flowers,based on a mutation that causes stamens to develop as extra petals.How do you predict these commercial flowers reproduce among themselves?

Accepted Answer

The answer of As described in your book,many commercial flowers...

Question 9

A basic difference between self-pollination and cross-pollination is:

Accepted Answer

Self-pollination involves pollen coming from the same plant or a genetically identical plant, while cross-pollination involves pollen coming from a different plant.

Question 10

Which one of the following is true of the sporophyte stage of a flowering plant?

Accepted Answer

The sporophyte stage of a flowering plant is the diploid phase that is typically the most visible and dominant stage of the plant's life cycle. For example, an oak tree, including its trunk, branches, leaves, and flowers, represents the sporophyte stage.

Question 11

Male gametophytes are produced by which of the following processes?

Accepted Answer

The answer of Male gametophytes are produced by which of...

Question 12

Double fertilization is important to the reproductive process because it produces:

Accepted Answer

Double fertilization refers to the process in flowering plants in which two sperm cells fertilize two different structures within the female reproductive system. One sperm cell fertilizes the egg cell, forming a diploid zygote, which will develop into the embryo of the seed. The other sperm cell fertilizes two polar nuclei in the central cell, resulting in a triploid nucleus, which will give rise to the endosperm, a nutrient-rich tissue that provides the developing embryo with nourishment. Therefore, double fertilization produces both the zygote and the endosperm, making Option A the correct answer.

Question 13

One application of modified flower parts has been the development of cultivated flowers from wild ones such as with:

Accepted Answer

The answer of One application of modified flower parts has...

Question 14

The process involving microspore division and a tough wall to protect the gametophyte leads to the production of what end product?

Accepted Answer

The process described is meiosis in the anthers of a flower, which results in the production of pollen grains. The tough wall mentioned is the sporopollenin layer that surrounds the pollen grain, protecting the gametophyte inside. Therefore, the end product is pollen.

Question 15

Flowers that have all four floral parts are said to be:

Accepted Answer

Complete flowers contain all four traditional floral parts: sepals, petals, stamens, and carpels.

Question 16

A flower that lacks any one of its floral parts might be called:

Accepted Answer

When a flower lacks any one of its floral parts, it is considered incomplete because it does not have all the necessary components for reproduction. Choices A, B, and C do not accurately describe the situation of a missing floral part. Choice E implies that the flower is almost complete, which is not the case when a necessary part is missing.

Question 17

Which of the following is NOT a characteristic of the gametophyte stage of the flowering plant?

Accepted Answer

The gametophyte stage of the flowering plant is haploid and produces gametes. It is also dependent on the sporophyte stage for nutrients and support. Therefore, the only characteristic that is not associated with the gametophyte stage is being diploid.

Question 18

Imperfect conditions in flowers refer to which of the following?

Accepted Answer

Imperfect conditions in flowers refer to the sexual parts being missing or not fully developed.

Question 19

The pistil of a flower is best described as:

Accepted Answer

The pistil is the female reproductive part of a flower and is composed of one or more carpels. A carpel is the female reproductive structure that includes the ovary, style, and stigma. So, the best description of the pistil is that it is a single carpel or a group of fused carpels.

Question 20

A flower could best be described as which of the following?

Accepted Answer

Flowers are best described as modified leaves because they are specialized structures that have evolved from leaf-like organs.

Quiz 30: Flowering Plants: Reproduction