Question 1

In most regions of Earth today, land flora consists predominantly of

Accepted Answer

Angiosperms, or flowering plants, make up the majority of land flora in most regions of the world, with approximately 300,000 known species. Gymnosperms, ferns, bryophytes, and club mosses make up much smaller proportions of land flora.

Question 2

Which of the following clades has the greatest number of species?

Accepted Answer

Angiosperms (flowering plants) have the greatest number of species, with over 300,000 known species. Conifers have around 630 species, Gnetophytes has around 70 species, Ginkgos have only one species, and Cycadophytes have around 300 species.

Question 3

In angiosperms, two male gametes contained within a single male gametophyte participate in fertilization. One sperm nucleus combines with the egg to produce a diploid zygote, and the other sperm nucleus combines with two other haploid nuclei of the female gametophyte. This process is called

Accepted Answer

The process described is double fertilization, where one sperm nucleus fuses with the egg to form a zygote, while the other sperm nucleus fuses with two polar nuclei to form the endosperm. Neither of the other options describe this process accurately.

Question 4

One reason for the enormous evolutionary success of seed plants is their possession of

Accepted Answer

Seed plants have developed seeds with food reserves for the young sporophyte, which allows for more successful growth and survival. Additionally, these seeds have a resting stage that can remain viable for many years, allowing for germination when conditions are favorable for growth of the sporophyte. This combination of traits has allowed seed plants to become some of the most successful and dominant plant species on earth. Complex leaves may contribute to photosynthesis, but they are not the main reason for the success of seed plants.

Question 5

Conifers and cycads began to flourish during which geologic time period?

Accepted Answer

Conifers and cycads began to flourish during the Permian period, which occurred between approximately 299 million to 251 million years ago. This was a time of great diversity in plant life, with the evolution of seed-bearing plants, including gymnosperms like conifers and cycads.

Question 6

Use the following to answer questions:
Match the correct group from the list below with the descriptions that follow. 
-The palmlike plants of the tropics; the earliest-diverging clade of gymnosperms

Accepted Answer

The answer of Use the following to answer questions:
Match the...

Question 7

The most abundant gymnosperms today are the cone-bearing plants, such as pines. These plants are classified as the

Accepted Answer

Cone-bearing plants, such as pines, are commonly referred to as conifers. The other options - cycads, ginkgos, and gnetophytes - are also gymnosperms, but they are less abundant and diverse than conifers.

Question 8

Use the following to answer questions:
Match the correct group from the list below with the descriptions that follow. 
-Represented today by a single species; common during the Mesozoic era; plants have fan-shaped leaves

Accepted Answer

The answer of Use the following to answer questions:
Match the...

Question 9

In angiosperms, double fertilization results in the development of

Accepted Answer

Double fertilization in angiosperms results in the production of both the embryo and the endosperm. The sperm from the pollen grain fertilizes the egg cell in the ovule, producing the embryo, while another sperm fuses with the central cell to form the endosperm. The endosperm provides nutrients for the developing embryo in the seed.

Question 10

Use the following to answer questions:
Match the correct group from the list below with the descriptions that follow. 
-Consists of three very different genera that share some characteristics with the angiosperms, including double fertilization

Accepted Answer

The answer of Use the following to answer questions:
Match the...

Question 11

Use the following to answer questions:
Match the correct group from the list below with the descriptions that follow. 
-Seeds are in cones; plants have needlelike or scalelike leaves; includes plants such as pines and redwoods

Accepted Answer

The answer of Use the following to answer questions:
Match the...

Question 12

The function of the pollen tube is to

Accepted Answer

The pollen tube grows from the pollen grain and digests through the sporophyte tissue to reach the female gametophyte for fertilization.

Question 13

The ovule consists of

Accepted Answer

The ovule is composed of the megasporangium, which contains the female gametophyte (embryo sac), and a protective layer called the integument. Therefore, choice A, which includes both the megasporangium and the integument, is the best answer. The other choices do not accurately reflect the components of the ovule.

Question 14

Which of the following groups of plants produces "wood" (extensively proliferated xylem)?

Accepted Answer

Plants that produce seeds, specifically gymnosperms and angiosperms, are known for producing wood, which is extensively proliferated xylem.

Question 15

Coniferous gymnosperms such as pines depend primarily on _______ for pollination; thus, the plants produce large quantities of pollen that disperse over large areas during the spring.

Accepted Answer

Coniferous gymnosperms such as pines rely on wind for pollination, as they do not produce nectar or other attractive structures to attract insects or other animal pollinators. As a result, they produce large quantities of lightweight pollen that can disperse over large distances with the aid of wind.

Question 16

Which group of gymnosperms includes a species that has male and female trees in which the sex is determined by sex chromosomes?

Accepted Answer

Ginkgos have distinct male and female trees, and their sex is determined by sex chromosomes.

Question 17

Which of the following groups is not classified as a gymnosperm?

Accepted Answer

Anthocerophytes are actually a group of bryophytes, which are nonvascular plants and not gymnosperms.

Question 18

Which of the following groups is characterized by fruits, flowers, endosperms, and much reduced gametophytes?

Accepted Answer

Angiosperms are the only group among the choices that have fruits, flowers, endosperms, and much reduced gametophytes as their key characteristics. Cycads, conifers, gnetophytes, and ginkgos lack one or more of these traits.

Question 19

The pistil consists of

Accepted Answer

The pistil is the female reproductive part of the flower and typically consists of three main parts: the stigma, style, and ovary. The stigma is the sticky surface at the top of the pistil where pollen is deposited, the style is the tube-like structure that connects the stigma to the ovary, and the ovary contains the ovules, which will eventually develop into seeds if fertilized. Therefore, choice C is the best answer as it correctly identifies all three parts of the pistil.

Question 20

Which of the following is a structure found in the stamen?

Accepted Answer

The anther is a structure found in the stamen of a flower. The stamen is the male reproductive part of a flower and consists of an anther and a filament. The anther produces and contains the pollen grains, which contain the male reproductive cells.

Quiz 29: The Evolution of Seed Plants

In most regions of Earth today, land flora consists predominantly of

Which of the following clades has the greatest number of species?

In angiosperms, two male gametes contained within a single male gametophyte participate in fertilization. One sperm nucleus combines with the egg to produce a diploid zygote, and the other sperm nucleus combines with two other haploid nuclei of the female gametophyte. This process is called

One reason for the enormous evolutionary success of seed plants is their possession of

Conifers and cycads began to flourish during which geologic time period?

Use the following to answer questions: Match the correct group from the list below with the descriptions that follow. -The palmlike plants of the tropics; the earliest-diverging clade of gymnosperms

The most abundant gymnosperms today are the cone-bearing plants, such as pines. These plants are classified as the

Use the following to answer questions: Match the correct group from the list below with the descriptions that follow. -Represented today by a single species; common during the Mesozoic era; plants have fan-shaped leaves

In angiosperms, double fertilization results in the development of

Use the following to answer questions: Match the correct group from the list below with the descriptions that follow. -Consists of three very different genera that share some characteristics with the angiosperms, including double fertilization

Use the following to answer questions: Match the correct group from the list below with the descriptions that follow. -Seeds are in cones; plants have needlelike or scalelike leaves; includes plants such as pines and redwoods

The function of the pollen tube is to

The ovule consists of

Which of the following groups of plants produces "wood" (extensively proliferated xylem) ?

Coniferous gymnosperms such as pines depend primarily on _______ for pollination; thus, the plants produce large quantities of pollen that disperse over large areas during the spring.

Which group of gymnosperms includes a species that has male and female trees in which the sex is determined by sex chromosomes?

Which of the following groups is not classified as a gymnosperm?

Which of the following groups is characterized by fruits, flowers, endosperms, and much reduced gametophytes?

The pistil consists of

Which of the following is a structure found in the stamen?