Question 1

Just before fertilization, a gymnosperm ovule contains:

Accepted Answer

A)  an embryo. 
B)  antheridia. 
C)  archegonia. 
D)  megaspores. 
E)  a seed coat. 
A)  an embryo. 
B)  antheridia. 
C)  archegonia. 
D)  megaspores. 
E)  a seed coat.

Question 2

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 3

The tallest living plant belongs to the family Cupressaceae.

Accepted Answer

A) True 
 B)False

Question 4

In seed plants, the ______ is called the nucellus.

Accepted Answer

A)  young sporophyte 
B)  megagametophyte 
C)  megaspore 
D)  megasporangium 
E)  embryo 
A)  young sporophyte 
B)  megagametophyte 
C)  megaspore 
D)  megasporangium 
E)  embryo

Question 5

Which of the following statements about cycads is FALSE?

Accepted Answer

A)  They resemble palms. 
B)  They exhibit secondary growth. 
C)  They produce nonflagellated sperm. 
D)  They are pollinated by insects. 
E)  They harbor cyanobacteria. 
A)  They resemble palms. 
B)  They exhibit secondary growth. 
C)  They produce nonflagellated sperm. 
D)  They are pollinated by insects. 
E)  They harbor cyanobacteria.

Question 6

The pollen grain is a partly developed megagametophyte.

Accepted Answer

A) True 
 B)False

Question 7

The pollen tube originally developed as a structure that permitted the male gametophyte to absorb nutrients during sperm formation.

Accepted Answer

A) True 
 B)False

Question 8

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 9

Which of the following is NOT a gymnosperm phylum?

Accepted Answer

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

Question 10

The bifacial vascular cambium evolved first in the progymnosperms.

Accepted Answer

A) True 
 B)False

Question 11

The exposed part of Welwitschia consists of a concave disc that produces only two strap-shaped leaves.

Accepted Answer

A) True 
 B)False

Question 12

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 13

Which of the following was NOT a step in the evolution of the ovule?

Accepted Answer

A)  Retention of the megaspores in the megasporangium 
B)  Production of only four megaspore mother cells per megasporangium 
C)  Formation of a highly reduced endosporic megagametophyte 
D)  Production of only one functional megaspore per megasporangium 
E)  Development of the embryo within the megagametophyte 
A)  Retention of the megaspores in the megasporangium 
B)  Production of only four megaspore mother cells per megasporangium 
C)  Formation of a highly reduced endosporic megagametophyte 
D)  Production of only one functional megaspore per megasporangium 
E)  Development of the embryo within the megagametophyte

Question 14

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 15

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

Accepted Answer

A) True 
 B)False

Question 16

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 17

All seed plants are heterosporous.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements concerning pollination drops is FALSE?

Accepted Answer

A)  They contain sugars and amino acids. 
B)  They contain proteins that function in pathogen defense. 
C)  They prevent pollen grains from contacting the nucellus. 
D)  They contain proteins that function in pollen development. 
E)  They exude from the open end of ovules. 
A)  They contain sugars and amino acids. 
B)  They contain proteins that function in pathogen defense. 
C)  They prevent pollen grains from contacting the nucellus. 
D)  They contain proteins that function in pollen development. 
E)  They exude from the open end of ovules.

Question 19

In the pine life cycle, meiosis occurs in:

Accepted Answer

A)  archegonia. 
B)  microspores. 
C)  microsporocytes. 
D)  pollen grains. 
E)  sporophylls. 
A)  archegonia. 
B)  microspores. 
C)  microsporocytes. 
D)  pollen grains. 
E)  sporophylls.

Question 20

Each gymnosperm ovule usually produces several archegonia.

Accepted Answer

A) True 
 B)False

Exam 18: Gymnosperms

Just before fertilization, a gymnosperm ovule contains:

In which gymnosperms do multiflagellated sperm swim to an archegonium?

The tallest living plant belongs to the family Cupressaceae.

In seed plants, the ______ is called the nucellus.

Which of the following statements about cycads is FALSE?

The pollen grain is a partly developed megagametophyte.

The pollen tube originally developed as a structure that permitted the male gametophyte to absorb nutrients during sperm formation.

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

Which of the following is NOT a gymnosperm phylum?

The bifacial vascular cambium evolved first in the progymnosperms.

The exposed part of Welwitschia consists of a concave disc that produces only two strap-shaped leaves.

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

Which of the following was NOT a step in the evolution of the ovule?

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

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

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

All seed plants are heterosporous.

Which of the following statements concerning pollination drops is FALSE?

In the pine life cycle, meiosis occurs in:

Each gymnosperm ovule usually produces several archegonia.

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

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