Question 1

Which of the following statements about conifers is FALSE?

Accepted Answer

A) They belong to the phylum Coniferophyta. 
B) Their leaves have humidity-resistant features. 
C) They are the most ecologically important gymnosperms. 
D) They include the pines, firs, and spruces. 
E) The tallest vascular plant is a conifer. 
A) They belong to the phylum Coniferophyta. 
B) Their leaves have humidity-resistant features. 
C) They are the most ecologically important gymnosperms. 
D) They include the pines, firs, and spruces. 
E) The tallest vascular plant is a conifer.

Question 2

Members of the phylum ______ harbor a green alga that exists in a "precursor" state, having neither discernible nuclei nor mitochondria.

Accepted Answer

A) Ginkgophyta 
B) Coniferophyta 
C) Gnetophyta 
D) Progymnospermophyta 
E) Cycadophyta 
A) Ginkgophyta 
B) Coniferophyta 
C) Gnetophyta 
D) Progymnospermophyta 
E) Cycadophyta

Question 3

Gymnosperms having fan-shaped deciduous leaves belong to the phylum:

Accepted Answer

A) Cycadophyta. 
B) Coniferophyta. 
C) Ginkgophyta. 
D) Progymnospermophyta. 
E) Gnetophyta. 
A) Cycadophyta. 
B) Coniferophyta. 
C) Ginkgophyta. 
D) Progymnospermophyta. 
E) Gnetophyta.

Question 4

Which of the following statements about gymnosperms is FALSE?

Accepted Answer

A) Gymnosperm means "naked seed." 
B) Ovules and seeds are exposed on the surface of sporophylls. 
C) The female gametophyte produces several archegonia. 
D) The male gametophyte produces several antheridia. 
E) The male gametophyte is endosporic. 
A) Gymnosperm means "naked seed." 
B) Ovules and seeds are exposed on the surface of sporophylls. 
C) The female gametophyte produces several archegonia. 
D) The male gametophyte produces several antheridia. 
E) The male gametophyte is endosporic.

Question 5

In Pinus, the four-celled pollen grain consists of one prothallial cell, two generative cells, and one tube cell.

Accepted Answer

A) True 
 B)False

Question 6

In gymnosperms, pollination occurs usually by:

Accepted Answer

A) insects. 
B) water. 
C) wind. 
D) birds. 
E) mammals. 
A) insects. 
B) water. 
C) wind. 
D) birds. 
E) mammals.

Question 7

A seed is composed of a(n) ______ and ______.

Accepted Answer

A) ovule; embryo 
B) ovule; megasporangium 
C) ovule; integuments 
D) megasporangium; embryo 
E) megasporangium; integuments 
A) ovule; embryo 
B) ovule; megasporangium 
C) ovule; integuments 
D) megasporangium; embryo 
E) megasporangium; integuments

Question 8

A seed develops into an ovule.

Accepted Answer

A) True 
 B)False

Question 9

After fertilization, the integuments develop into the:

Accepted Answer

A) seed coat. 
B) ovule. 
C) nucellus. 
D) micropyle. 
E) megaspore. 
A) seed coat. 
B) ovule. 
C) nucellus. 
D) micropyle. 
E) megaspore.

Question 10

In gymnosperms, the ovules abort about 95 percent of the time.

Accepted Answer

A) True 
 B)False

Question 11

In pine, the mature microgametophyte is the germinated pollen grain.

Accepted Answer

A) True 
 B)False

Question 12

In the ______, ovules are solitary and surrounded by an aril.

Accepted Answer

A) larches 
B) hemlocks 
C) yews 
D) junipers 
E) spruces 
A) larches 
B) hemlocks 
C) yews 
D) junipers 
E) spruces

Question 13

The bifacial vascular cambium evolved first in the progymnosperms.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following questions concerning the progymnosperms is FALSE?

Accepted Answer

A) They had a bifacial vascular cambium. 
B) Archaeopteris was a major type. 
C) Some contain a eustele. 
D) Most were heterosporous. 
E) Seed plants are thought to have evolved from plants similar to the progymnosperms. 
A) They had a bifacial vascular cambium. 
B) Archaeopteris was a major type. 
C) Some contain a eustele. 
D) Most were heterosporous. 
E) Seed plants are thought to have evolved from plants similar to the progymnosperms.

Question 15

Which of the following statements about the embryogeny of pine is FALSE?

Accepted Answer

A) Three types of polyembryony occur in most species. 
B) Four tiers of embryonic cells form at the lower end of the archegonium. 
C) Suspensor cells force the embryos through the wall of the archegonium. 
D) An embryo begins to develop from each of the four cells farthest from the micropyle. 
E) The integument develops into a seed coat. 
A) Three types of polyembryony occur in most species. 
B) Four tiers of embryonic cells form at the lower end of the archegonium. 
C) Suspensor cells force the embryos through the wall of the archegonium. 
D) An embryo begins to develop from each of the four cells farthest from the micropyle. 
E) The integument develops into a seed coat.

Question 16

In which gymnosperms do multiflagellated sperm swim to an archegonium?

Accepted Answer

A) None 
B) Ginkgo only 
C) Gnetophytes only 
D) Cycads only 
E) Ginkgo and cycads 
A) None 
B) Ginkgo only 
C) Gnetophytes only 
D) Cycads only 
E) Ginkgo and cycads

Question 17

In pines, the mature male gametophyte consists of:

Accepted Answer

A) one tube cell and one generative cell. 
B) one tube cell, one sterile cell, and one spermatogenous cell. 
C) two prothallial cells, one tube cell, and one generative cell. 
D) two prothallial cells, one tube cell, one sterile cell, and one spermatogenous cell. 
E) two prothallial cells, one tube cell, one sterile cell, and two sperm. 
A) one tube cell and one generative cell. 
B) one tube cell, one sterile cell, and one spermatogenous cell. 
C) two prothallial cells, one tube cell, and one generative cell. 
D) two prothallial cells, one tube cell, one sterile cell, and one spermatogenous cell. 
E) two prothallial cells, one tube cell, one sterile cell, and two sperm.

Question 18

The microgametophytes of Gymnosperms usually produce at least one antheridium.

Accepted Answer

A) True 
 B)False

Question 19

Seeds are thought to have evolved before wood.

Accepted Answer

A) True 
 B)False

Question 20

The pollen grain is a partly developed megagametophyte.

Accepted Answer

A) True 
 B)False

Exam 18: Gymnosperms

Which of the following statements about conifers is FALSE?

Members of the phylum ______ harbor a green alga that exists in a "precursor" state, having neither discernible nuclei nor mitochondria.

Gymnosperms having fan-shaped deciduous leaves belong to the phylum:

Which of the following statements about gymnosperms is FALSE?

In Pinus, the four-celled pollen grain consists of one prothallial cell, two generative cells, and one tube cell.

In gymnosperms, pollination occurs usually by:

A seed is composed of a(n) ______ and ______.

A seed develops into an ovule.

After fertilization, the integuments develop into the:

In gymnosperms, the ovules abort about 95 percent of the time.

In pine, the mature microgametophyte is the germinated pollen grain.

In the ______, ovules are solitary and surrounded by an aril.

The bifacial vascular cambium evolved first in the progymnosperms.

Which of the following questions concerning the progymnosperms is FALSE?

Which of the following statements about the embryogeny of pine is FALSE?

In which gymnosperms do multiflagellated sperm swim to an archegonium?

In pines, the mature male gametophyte consists of:

The microgametophytes of Gymnosperms usually produce at least one antheridium.

Seeds are thought to have evolved before wood.

The pollen grain is a partly developed megagametophyte.

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

A seed is composed of a(n) and .