Question 1

The oldest well-documented flowering plant fossils date to about ____ years ago. ​

Accepted Answer

The oldest well-documented flowering plant fossils date to about 125 million years ago.

Question 2

The ____ phylum contains one living vascular, seed-bearing plant species - a deciduous tree with fan-shaped leaves. . It has separate male and female plants, and the males are often planted in cities because of their resistance to pollution, insects, and disease. ​

Accepted Answer

The description provided matches with the only living species in the Ginkgophyta phylum, which is the Ginkgo biloba tree. It is a deciduous tree with fan-shaped leaves, has separate male and female plants and is commonly planted in cities for its pollution, insect, and disease resistance. The other options have multiple living species and do not match the description provided.

Question 3

The ____ phylum consists of vascular, seed-bearing plants, including pines, spruces, firs, hemlocks, junipers, cypresses, and redwoods. Most of them are evergreens that form woody reproductive cones. ​

Accepted Answer

Coniferophyta is the phylum that consists of vascular, seed-bearing plants, including pines, spruces, firs, hemlocks, junipers, cypresses, and redwoods. These types of plants are mostly evergreens that form woody reproductive cones.

Question 4

One of the two main angiosperm clades, the ____ has about 200,000 species. All members of this group have pollen grains with three grooves, and most have two cotyledons and net-veined leaves. ​

Accepted Answer

The description given corresponds to eudicots, which are one of the two main angiosperm clades and have about 200,000 species. They also have pollen grains with three grooves, two cotyledons, and net-veined leaves. The other main clade, monocots, have one cotyledon, parallel-veined leaves, and pollen grains with a single groove. The other answer choices, laurels, water lilies, and magnoliids, are all groups of plants but do not fit the characteristics described.

Question 5

The ____ phylum has only about 70 living species of vascular, seed-bearing plants in three genera, including Welwitschia and Ephedra . Some species have a two-step fertilization process, similar to fertilization in angiosperms. ​

Accepted Answer

The phylum mentioned is Gnetophyta, which has three genera including Welwitschia and Ephedra. Some species in this phylum have a two-step fertilization process like angiosperms. The other options, Cycadophyta, Coniferophyta, and Ginkgophyta, do not fit the description given. Anthophyta is the phylum for flowering plants or angiosperms, which is not the same as Gnetophyta.

Question 6

Two of the oldest flowering plant fossils are known to belong to the genus ____, and are thought to have lived during the early ____ period. ​

Accepted Answer

Archaefructus is known to be one of the oldest flowering plant fossils and is believed to have lived during the early Cretaceous period. Amborella is also considered to be an early flowering plant, but it is believed to have originated during the early Cenozoic era, which was much later than the early Cretaceous period. Eucalyptus is a modern genus of flowering plants and did not exist during the Carboniferous or Cretaceous periods.

Question 7

Pollination in most cycads usually occurs when ____ transfer pollen from male plants to the developing gametophyte on female plants. ​

Accepted Answer

Cycads are pollinated by beetles that are attracted to their cone-like structures and odor. The beetles crawl inside the cones to lay their eggs and while doing so, they transfer pollen from male plants to the developing gametophyte on female plants. This type of pollination is known as gymnosperm pollination.

Question 8

The cycad lineage probably arose from ____. ​

Accepted Answer

The fossil record suggests that the cycad lineage arose from an extinct group of gymnosperms called seed ferns, which were dominant plant species during the late Paleozoic and early Mesozoic eras.

Question 9

Which trait is a characteristic of most monocots? ​

Accepted Answer

The answer of Which trait is a characteristic of most...

Question 10

The ____ are the only land plants make true flowers and fruits. ​

Accepted Answer

Only angiosperms have true flowers and fruits, which are unique adaptations for sexual reproduction and seed dispersal. Bryophytes and seedless vascular plants reproduce via spores, while gymnosperms have cones and naked seeds.

Question 11

In the pine life cycle, microspores are produced in ____ and develop into ____.

Accepted Answer

Microspores are produced in microsporangia of pollen cones and develop into pollen.

Question 12

In pine trees, megaspores develop within a(n)____.

Accepted Answer

Megaspores develop within the ovules of pine trees.

Question 13

The ____ phylum has about 550 known living species of vascular, seed-bearing plants, the most among gymnosperms. Many of them have needlelike leaves with thick cuticles and sunken stomata, and are thus adapted to dry conditions. ​

Accepted Answer

The description given matches with the characteristics of the Coniferophyta phylum, which includes trees such as pines, spruces, firs, and cedars. The other options are not the best choices because Cycadophyta has palm-like leaves, Anthophyta includes flowering plants, Gnetophyta has a diverse set of characteristics, and Ginkgophyta has fan-shaped leaves.

Question 14

Various cycad tissues produce ____, which may help deter predatory insects. ​

Accepted Answer

Alkaloids are compounds that have been shown to have insecticidal properties and are often produced by plants as a defense mechanism against herbivores or predatory insects. Cycads have been found to produce alkaloids in various tissues, including their stems and leaves, which may help deter insects from feeding on the plant.

Question 15

The "naked" seeds of conifers develop ____. ​

Accepted Answer

Naked seeds of conifers, also known as gymnosperms, develop on the scales of ovulate cones. Unlike angiosperms, the ovules of gymnosperms are not encased within a protective ovary. Instead, the ovules are exposed on the surface of modified leaves called scales, which make up the structure of the cones. Pollen cones, on the other hand, produce pollen in microsporangia, which are not involved in the development of the naked seeds.

Question 16

One of the two main angiosperm clades, the ____, has about 60,000 species that are characterized by a single cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves. ​

Accepted Answer

Monocots are characterized by a single cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves.

Question 17

The ____ phylum has an estimated 350,000 known living species of vascular, seed-bearing plants, and is the dominant group of land plants today.

Accepted Answer

Anthophyta, also known as flowering plants, is the largest and most diverse phylum of vascular plants. It includes an estimated 350,000 known species and is the dominant group of land plants today. The other options either have fewer known species or are not as dominant in modern plant populations.

Question 18

In the pine life cycle, the processes of pollination, fertilization, and seed formation typically take ____ to complete. ​

Accepted Answer

The answer of In the pine life cycle, the processes...

Question 19

In pines, the mature male gametophyte is called the ____.

Accepted Answer

The answer of In pines, the mature male gametophyte is...

Question 20

About 80% of all living gymnosperm species belong to the phylum ____.

Accepted Answer

Coniferophyta includes the majority of living gymnosperm species, including pine, spruce, fir, and cedar trees. Anthophyta, also known as flowering plants, are not gymnosperms. Cycadophyta, Ginkgophyta, and Gnetophyta have fewer living species compared to Coniferophyta.

Quiz 29: Seed Plants

The oldest well-documented flowering plant fossils date to about ____ years ago.

The ____ phylum contains one living vascular, seed-bearing plant species - a deciduous tree with fan-shaped leaves. . It has separate male and female plants, and the males are often planted in cities because of their resistance to pollution, insects, and disease.

The ____ phylum consists of vascular, seed-bearing plants, including pines, spruces, firs, hemlocks, junipers, cypresses, and redwoods. Most of them are evergreens that form woody reproductive cones.

One of the two main angiosperm clades, the ____ has about 200,000 species. All members of this group have pollen grains with three grooves, and most have two cotyledons and net-veined leaves.

The ____ phylum has only about 70 living species of vascular, seed-bearing plants in three genera, including Welwitschia and Ephedra . Some species have a two-step fertilization process, similar to fertilization in angiosperms.

Two of the oldest flowering plant fossils are known to belong to the genus , and are thought to have lived during the early period.

Pollination in most cycads usually occurs when ____ transfer pollen from male plants to the developing gametophyte on female plants.

The cycad lineage probably arose from ____.

Which trait is a characteristic of most monocots?

The ____ are the only land plants make true flowers and fruits.

In the pine life cycle, microspores are produced in and develop into .

In pine trees, megaspores develop within a(n) ____.

The ____ phylum has about 550 known living species of vascular, seed-bearing plants, the most among gymnosperms. Many of them have needlelike leaves with thick cuticles and sunken stomata, and are thus adapted to dry conditions.

Various cycad tissues produce ____, which may help deter predatory insects.

The "naked" seeds of conifers develop ____.

One of the two main angiosperm clades, the ____, has about 60,000 species that are characterized by a single cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves.

The ____ phylum has an estimated 350,000 known living species of vascular, seed-bearing plants, and is the dominant group of land plants today.

In the pine life cycle, the processes of pollination, fertilization, and seed formation typically take ____ to complete.

In pines, the mature male gametophyte is called the ____.

About 80% of all living gymnosperm species belong to the phylum ____.

Quiz 29: Seed Plants

The oldest well-documented flowering plant fossils date to about ____ years ago. ​

The ____ phylum contains one living vascular, seed-bearing plant species - a deciduous tree with fan-shaped leaves. . It has separate male and female plants, and the males are often planted in cities because of their resistance to pollution, insects, and disease. ​

The ____ phylum consists of vascular, seed-bearing plants, including pines, spruces, firs, hemlocks, junipers, cypresses, and redwoods. Most of them are evergreens that form woody reproductive cones. ​

One of the two main angiosperm clades, the ____ has about 200,000 species. All members of this group have pollen grains with three grooves, and most have two cotyledons and net-veined leaves. ​

The ____ phylum has only about 70 living species of vascular, seed-bearing plants in three genera, including Welwitschia and Ephedra . Some species have a two-step fertilization process, similar to fertilization in angiosperms. ​

Two of the oldest flowering plant fossils are known to belong to the genus ____, and are thought to have lived during the early ____ period. ​

Pollination in most cycads usually occurs when ____ transfer pollen from male plants to the developing gametophyte on female plants. ​

The cycad lineage probably arose from ____. ​

Which trait is a characteristic of most monocots? ​

The ____ are the only land plants make true flowers and fruits. ​

In the pine life cycle, microspores are produced in ____ and develop into ____.

In pine trees, megaspores develop within a(n) ____.

The ____ phylum has about 550 known living species of vascular, seed-bearing plants, the most among gymnosperms. Many of them have needlelike leaves with thick cuticles and sunken stomata, and are thus adapted to dry conditions. ​

Various cycad tissues produce ____, which may help deter predatory insects. ​

The "naked" seeds of conifers develop ____. ​

One of the two main angiosperm clades, the ____, has about 60,000 species that are characterized by a single cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves. ​

The ____ phylum has an estimated 350,000 known living species of vascular, seed-bearing plants, and is the dominant group of land plants today.

In the pine life cycle, the processes of pollination, fertilization, and seed formation typically take ____ to complete. ​

In pines, the mature male gametophyte is called the ____.

About 80% of all living gymnosperm species belong to the phylum ____.

The oldest well-documented flowering plant fossils date to about ____ years ago.

The ____ phylum contains one living vascular, seed-bearing plant species - a deciduous tree with fan-shaped leaves. . It has separate male and female plants, and the males are often planted in cities because of their resistance to pollution, insects, and disease.

The ____ phylum consists of vascular, seed-bearing plants, including pines, spruces, firs, hemlocks, junipers, cypresses, and redwoods. Most of them are evergreens that form woody reproductive cones.

One of the two main angiosperm clades, the ____ has about 200,000 species. All members of this group have pollen grains with three grooves, and most have two cotyledons and net-veined leaves.

The ____ phylum has only about 70 living species of vascular, seed-bearing plants in three genera, including Welwitschia and Ephedra . Some species have a two-step fertilization process, similar to fertilization in angiosperms.

Two of the oldest flowering plant fossils are known to belong to the genus , and are thought to have lived during the early period.

Pollination in most cycads usually occurs when ____ transfer pollen from male plants to the developing gametophyte on female plants.

The cycad lineage probably arose from ____.

Which trait is a characteristic of most monocots?

The ____ are the only land plants make true flowers and fruits.

In the pine life cycle, microspores are produced in and develop into .

The ____ phylum has about 550 known living species of vascular, seed-bearing plants, the most among gymnosperms. Many of them have needlelike leaves with thick cuticles and sunken stomata, and are thus adapted to dry conditions.

Various cycad tissues produce ____, which may help deter predatory insects.

The "naked" seeds of conifers develop ____.

One of the two main angiosperm clades, the ____, has about 60,000 species that are characterized by a single cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves.

In the pine life cycle, the processes of pollination, fertilization, and seed formation typically take ____ to complete.