Question 1

Pollination begins when pollen is transferred from the

Accepted Answer

A) anther to the ovary of a flower. 
B) anther to the receptacle of a flower. 
C) anther to the stigma of a flower. 
D) stigma to the embryo sac of a flower. 
E) synergid to the egg of a flower. 
A) anther to the ovary of a flower. 
B) anther to the receptacle of a flower. 
C) anther to the stigma of a flower. 
D) stigma to the embryo sac of a flower. 
E) synergid to the egg of a flower. C

Question 2

Which of the following statements about plant tissue culture is false?

Accepted Answer

A) Callus tissue can form roots and shoots. 
B) Individual cells can give rise to whole plants through tissue cultures. 
C) Individual protoplasts are isolated from tissues by breaking down the cells walls with enzymes. 
D) Virus-free crop species can be propagated by culturing meristems. 
E) A callus is a mass of undifferentiated cells. 
A) Callus tissue can form roots and shoots. 
B) Individual cells can give rise to whole plants through tissue cultures. 
C) Individual protoplasts are isolated from tissues by breaking down the cells walls with enzymes. 
D) Virus-free crop species can be propagated by culturing meristems. 
E) A callus is a mass of undifferentiated cells. E

Question 3

All of the following are flower parts except the

Accepted Answer

A) endosperm. 
B) calyx. 
C) corolla. 
D) stigma. 
E) stylE. 
A) endosperm. 
B) calyx. 
C) corolla. 
D) stigma. 
E) stylE. A

Question 4

Which of the following statements about plant reproduction is incorrect?

Accepted Answer

A) Monoecious plants can have male and female flowers on the same plant. 
B) Dioecious plants have male and female flowers on different plants. 
C) Self-pollinating angiosperms are usually adapted to specific uniform habitats. 
D) Outcrossing promotes genetic diversity. 
E) Self-pollinated plants need to be visited by pollinators sometime during the time of pollen releasE. 
A) Monoecious plants can have male and female flowers on the same plant. 
B) Dioecious plants have male and female flowers on different plants. 
C) Self-pollinating angiosperms are usually adapted to specific uniform habitats. 
D) Outcrossing promotes genetic diversity. 
E) Self-pollinated plants need to be visited by pollinators sometime during the time of pollen releasE.

Question 5

The swollen lower portion of the carpels enclose

Accepted Answer

A) pollen. 
B) ovules. 
C) petals. 
D) sepals. 
E) stamens. 
A) pollen. 
B) ovules. 
C) petals. 
D) sepals. 
E) stamens.

Question 6

Which of these characteristics does not promote outcrossing in flowering plants?

Accepted Answer

A) self-incompatibility 
B) dioecism 
C) monoecism 
D) physical separation of flower parts 
E) apomixis 
A) self-incompatibility 
B) dioecism 
C) monoecism 
D) physical separation of flower parts 
E) apomixis

Question 7

Early seed plants were pollinated by ________,as are present-day conifers.

Accepted Answer

A) beetles 
B) bees 
C) butterflies 
D) wind 
E) water 
A) beetles 
B) bees 
C) butterflies 
D) wind 
E) water

Question 8

Which of the following actions will cause a plant to revert from an adult phase back to a juvenile one?

Accepted Answer

A) induction of the LEAFY gene 
B) application of gibberellins 
C) far-red wavelengths of light 
D) removal of flowers 
E) application of abscisic acid 
A) induction of the LEAFY gene 
B) application of gibberellins 
C) far-red wavelengths of light 
D) removal of flowers 
E) application of abscisic acid

Question 9

Microspore mother cells produce microspores that develop into

Accepted Answer

A) egg cells. 
B) pollen grains. 
C) synergids. 
D) endosperm. 
E) megaspores. 
A) egg cells. 
B) pollen grains. 
C) synergids. 
D) endosperm. 
E) megaspores.

Question 10

At a certain point in the flowering process,shoots become committed to making a flower.This is called

Accepted Answer

A) apomixes. 
B) bilateralism. 
C) phase change. 
D) competence. 
E) floral determination. 
A) apomixes. 
B) bilateralism. 
C) phase change. 
D) competence. 
E) floral determination.

Question 11

Internal developmental changes allow plants to become able to respond to external and/or internal signals.This transition is known as

Accepted Answer

A) cloning. 
B) initiation. 
C) abscission. 
D) perennial development. 
E) phase changE. 
A) cloning. 
B) initiation. 
C) abscission. 
D) perennial development. 
E) phase changE.

Question 12

In a long-day plant,interrupting a long night with a flash of light may trigger flowering.Conversely,if a long day is interrupted by short period of darkness,why doesn't a short-day plant flower?

Accepted Answer

A) Sunlight contains enough far-red light to inhibit the phytochrome induction of flowering. 
B) Phytochrome degrades slowly in the dark to the inactive PR form.A brief dark period during the day is not sufficient to inactivate phytochrome. 
C) Phytochrome is only active in the dark. 
D) The circadian clock is less active during the day than at night. 
E) The cool temperatures at night interact with the phytochrome responsE. 
A) Sunlight contains enough far-red light to inhibit the phytochrome induction of flowering. 
B) Phytochrome degrades slowly in the dark to the inactive PR form.A brief dark period during the day is not sufficient to inactivate phytochrome. 
C) Phytochrome is only active in the dark. 
D) The circadian clock is less active during the day than at night. 
E) The cool temperatures at night interact with the phytochrome responsE.

Question 13

Self-pollinated angiosperms adapted to a particular uniform habitat are likely to produce large numbers of

Accepted Answer

A) outcrossed individuals. 
B) ill-adapted offspring. 
C) mutations. 
D) infertile offspring. 
E) uniform offspring. 
A) outcrossed individuals. 
B) ill-adapted offspring. 
C) mutations. 
D) infertile offspring. 
E) uniform offspring.

Question 14

Endosperm tissue of angiosperms has what ploidy level?

Accepted Answer

A) n 
B) 2n 
C) 3n 
D) 4n 
E) 8n 
A) n 
B) 2n 
C) 3n 
D) 4n 
E) 8n

Question 15

Which of the following is not an evolutionary trend in floral specialization?

Accepted Answer

A) There has been a trend toward numerous free,spirally arranged flower parts. 
B) Separate floral parts have become fused. 
C) The number of parts in each floral whorl has been reduced from many to few. 
D) The spiral patterns of attachment of floral parts in primitive angiosperms have evolved into a single whorl at each level. 
E) The central axis of many flowers has shortened,bringing the whorls closer together. 
A) There has been a trend toward numerous free,spirally arranged flower parts. 
B) Separate floral parts have become fused. 
C) The number of parts in each floral whorl has been reduced from many to few. 
D) The spiral patterns of attachment of floral parts in primitive angiosperms have evolved into a single whorl at each level. 
E) The central axis of many flowers has shortened,bringing the whorls closer together.

Question 16

Evolutionarily,floral parts are modified

Accepted Answer

A) stems. 
B) leaves. 
C) roots. 
D) stolons. 
E) buds. 
A) stems. 
B) leaves. 
C) roots. 
D) stolons. 
E) buds.

Question 17

Some flowers have distinctive markings that only reflect ultraviolet wavelengths of light and therefore are invisible to humans.Which statement about ultraviolet markings is not correct?

Accepted Answer

A) The ultraviolet markings are highly visible and attractive to bees. 
B) Carotenoid pigments are responsible for the ultraviolet markings. 
C) The ultraviolet markings often form a conspicuous central bull's eye or identify the best landing sites. 
D) The ultraviolet markings repel birds and bats from the flowers. 
E) Flowers with ultraviolet markings usually appear yellow or orange to humans. 
A) The ultraviolet markings are highly visible and attractive to bees. 
B) Carotenoid pigments are responsible for the ultraviolet markings. 
C) The ultraviolet markings often form a conspicuous central bull's eye or identify the best landing sites. 
D) The ultraviolet markings repel birds and bats from the flowers. 
E) Flowers with ultraviolet markings usually appear yellow or orange to humans.

Question 18

Pollinators may be attracted to a flower based on any of the following factors except

Accepted Answer

A) the amount of nectar. 
B) odor. 
C) color of the flower in visible light. 
D) color of the flower in UV light. 
E) taste of the ovules. 
A) the amount of nectar. 
B) odor. 
C) color of the flower in visible light. 
D) color of the flower in UV light. 
E) taste of the ovules.

Question 19

Which of these characteristics would most likely discourage self pollination in a flower with both stamens and pistils?

Accepted Answer

A) many more stamens than pistils 
B) long stamens and short pistils 
C) long pistils and short stamens 
D) pollen released before stigma is receptive (mature) 
E) flower is wind pollinated 
A) many more stamens than pistils 
B) long stamens and short pistils 
C) long pistils and short stamens 
D) pollen released before stigma is receptive (mature) 
E) flower is wind pollinated

Question 20

Which of the following processes is not involved in determining when a plant will produce flowers?

Accepted Answer

A) water potential 
B) temperature 
C) light 
D) promotive internal signals 
E) inhibitory internal signals 
A) water potential 
B) temperature 
C) light 
D) promotive internal signals 
E) inhibitory internal signals

Exam 42: Plant Reproduction

Pollination begins when pollen is transferred from the

Which of the following statements about plant tissue culture is false?

All of the following are flower parts except the

Which of the following statements about plant reproduction is incorrect?

The swollen lower portion of the carpels enclose

Which of these characteristics does not promote outcrossing in flowering plants?

Early seed plants were pollinated by ________,as are present-day conifers.

Which of the following actions will cause a plant to revert from an adult phase back to a juvenile one?

Microspore mother cells produce microspores that develop into

At a certain point in the flowering process,shoots become committed to making a flower.This is called

Internal developmental changes allow plants to become able to respond to external and/or internal signals.This transition is known as

In a long-day plant,interrupting a long night with a flash of light may trigger flowering.Conversely,if a long day is interrupted by short period of darkness,why doesn't a short-day plant flower?

Self-pollinated angiosperms adapted to a particular uniform habitat are likely to produce large numbers of

Endosperm tissue of angiosperms has what ploidy level?

Which of the following is not an evolutionary trend in floral specialization?

Evolutionarily,floral parts are modified

Some flowers have distinctive markings that only reflect ultraviolet wavelengths of light and therefore are invisible to humans.Which statement about ultraviolet markings is not correct?

Pollinators may be attracted to a flower based on any of the following factors except

Which of these characteristics would most likely discourage self pollination in a flower with both stamens and pistils?

Which of the following processes is not involved in determining when a plant will produce flowers?

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes Mapping and the Meiosis - Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics and the Phylogenetic Revolution

Genome Evolution

Evolution of Development

The Tree of Life

Viruses

Prokaryotes

Protists

Overview of Green Plants

Fungi

Overview of Animal Diversity

Noncoelomate Invertebrates

Coelomate Invertebrates

Vertebrates

Plant Form

Vegetative Plant Development

Transport in Plants

Plant Nutrition and Soils

Plant Defense Responses

Sensory Systems in Plants

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Animal Development

Behavioral Biology

Population Ecology

Community of Ecology

Dynamics of Ecosystems

The Biosphere

Conservation Biology