Question 1

The vast number and variety of flowering plant species is probably related to which of the following?

Accepted Answer

A)  soils 
B)  pollinators 
C)  herbivores 
D)  climatic conditions 
A)  soils 
B)  pollinators 
C)  herbivores 
D)  climatic conditions

Question 2

Which of the following flower parts develops into the pulp of a fleshy fruit?

Accepted Answer

A)  stigma 
B)  style 
C)  ovule 
D)  ovary 
A)  stigma 
B)  style 
C)  ovule 
D)  ovary

Question 3

Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?

Accepted Answer

A)  petals → sepals → stamens → carpels 
B)  sepals → stamens → petals → carpels 
C)  spores → gametes → zygote → embryo 
D)  sepals → petals → stamens → carpels 
A)  petals → sepals → stamens → carpels 
B)  sepals → stamens → petals → carpels 
C)  spores → gametes → zygote → embryo 
D)  sepals → petals → stamens → carpels

Question 4

What is the typical ploidy of endosperm cells in an angiosperm seed?

Accepted Answer

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

Question 5

Farmers traditionally kept some of the seeds from their best plants in one season to plant the following year. Now that farmers mostly plant hybrid seed this practice is no longer effective because ________.

Accepted Answer

A)  hybrid seed is homozygous, so it is not self-fertile 
B)  hybrid plants are bred to be incompatible 
C)  hybrid seeds are heterozygous and not true-breeding 
D)  hybrid plants are genetically engineered and could be harmful if used for new seed 
A)  hybrid seed is homozygous, so it is not self-fertile 
B)  hybrid plants are bred to be incompatible 
C)  hybrid seeds are heterozygous and not true-breeding 
D)  hybrid plants are genetically engineered and could be harmful if used for new seed

Question 6

Which of the following is necessary for a generative cell in a pollen grain to produce two sperm cells?

Accepted Answer

A)  a single mitotic division 
B)  a single meiotic division 
C)  two mitotic divisions 
D)  two meiotic divisions 
A)  a single mitotic division 
B)  a single meiotic division 
C)  two mitotic divisions 
D)  two meiotic divisions

Question 7

Which of the following pollinating agents is correctly matched with the type of plant it helps pollinate?

Accepted Answer

A)  birds-smelly flowers 
B)  bats-colorful flowers 
C)  wind-grass flowers 
D)  bees-white flowers 
A)  birds-smelly flowers 
B)  bats-colorful flowers 
C)  wind-grass flowers 
D)  bees-white flowers

Question 8

Based on the table below, which species has fruits adapted for dispersal by fruit-eating animals (frugivores)?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 9

Which of the following best describes double fertilization in flowering plants?

Accepted Answer

A)  flowers must be pollinated twice to yield both fruits and seeds 
B)  one sperm fertilizes the egg, and a second sperm fertilizes both polar nuclei 
C)  the egg of the embryo sac is diploid 
D)  two sperms are needed to fertilize the egg 
A)  flowers must be pollinated twice to yield both fruits and seeds 
B)  one sperm fertilizes the egg, and a second sperm fertilizes both polar nuclei 
C)  the egg of the embryo sac is diploid 
D)  two sperms are needed to fertilize the egg

Question 10

Which of the following best describes a selective advantage of retaining the gametophyte within the living sporophyte of land plants?

Accepted Answer

A)  The gametophyte is able to grow much larger than if it was independent. 
B)  The gametophyte can be raised into the air, exposing it to more light for photosynthesis. 
C)  Meiosis can now occur in haploid gametophyte cells. 
D)  Nutrients needed for the gametophyte to produce gametes can be provided by the parent plant. 
A)  The gametophyte is able to grow much larger than if it was independent. 
B)  The gametophyte can be raised into the air, exposing it to more light for photosynthesis. 
C)  Meiosis can now occur in haploid gametophyte cells. 
D)  Nutrients needed for the gametophyte to produce gametes can be provided by the parent plant.

Question 11

Which of the following is the strongest environmental argument against the introduction of genetically modified crops?

Accepted Answer

A)  Lateral transfer of genes between species does not occur naturally. 
B)  Transgenic crops can no longer reproduce sexually and would go extinct in nature. 
C)  The pollen of genetically modified flowers would be sterile. 
D)  Transgenic crops hybridize with related native species, allowing modified traits to spread in the wild. 
A)  Lateral transfer of genes between species does not occur naturally. 
B)  Transgenic crops can no longer reproduce sexually and would go extinct in nature. 
C)  The pollen of genetically modified flowers would be sterile. 
D)  Transgenic crops hybridize with related native species, allowing modified traits to spread in the wild.

Question 12

Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm.
1) ovary
2) ovule
3) egg
4) carpel
5) embryo sac

Accepted Answer

A)  4, 2, 1, 5, 3 
B)  5, 4, 3, 1, 2 
C)  5, 1, 4, 2, 3 
D)  4, 1, 2, 5, 3 
A)  4, 2, 1, 5, 3 
B)  5, 4, 3, 1, 2 
C)  5, 1, 4, 2, 3 
D)  4, 1, 2, 5, 3

Question 13

A hypothetical dye stains sporophyte tissue blue and gametophyte tissue red. What would a researcher most likely observe if a section through the center of a seed was stained with this dye?

Accepted Answer

A)  a pure blue sample 
B)  a red center surrounded by blue 
C)  a blue center surrounded by red 
D)  a blue center, surrounded by red, inside a blue exterior 
A)  a pure blue sample 
B)  a red center surrounded by blue 
C)  a blue center surrounded by red 
D)  a blue center, surrounded by red, inside a blue exterior

Question 14

"Golden Rice" is a GM crop designed to enhance which of the following traits?

Accepted Answer

A)  increase resistance to various herbicides, making it practical to weed rice fields with those herbicides 
B)  produce a toxin that reduces damage from insect pests 
C)  produce larger grains that increase crop yields and profits 
D)  increase vitamin A content, a common dietary deficiency in developing countries 
A)  increase resistance to various herbicides, making it practical to weed rice fields with those herbicides 
B)  produce a toxin that reduces damage from insect pests 
C)  produce larger grains that increase crop yields and profits 
D)  increase vitamin A content, a common dietary deficiency in developing countries

Question 15

Which of the following is the best argument for pursuing plant biotechnology?

Accepted Answer

A)  Genetically modified (GM) plants can provide greater plant productivity on the same amount of land. 
B)  GM plants can reduce reliance on imported oil. 
C)  Genetic engineering can decrease genetic diversity of crop plants making them more fit for their environment. 
D)  Genetic engineering can make it easier to overcome pollination incompatibility. 
A)  Genetically modified (GM) plants can provide greater plant productivity on the same amount of land. 
B)  GM plants can reduce reliance on imported oil. 
C)  Genetic engineering can decrease genetic diversity of crop plants making them more fit for their environment. 
D)  Genetic engineering can make it easier to overcome pollination incompatibility.

Question 16

A summer occupation in maize-growing regions is detasseling the maize: removing unwanted male flowers so that female flowers on the same plant are pollinated by the desired pollen for the hybrid maize. Which of the following best describes maize plant flowers?

Accepted Answer

A)  They have both stamens and carpels and the plant is dioecious. 
B)  They have both stamens and carpels and the plant is monoecious. 
C)  They have either stamens or carpels and the plant is dioecious. 
D)  They have either stamens or carpels and the plant is monoecious. 
A)  They have both stamens and carpels and the plant is dioecious. 
B)  They have both stamens and carpels and the plant is monoecious. 
C)  They have either stamens or carpels and the plant is dioecious. 
D)  They have either stamens or carpels and the plant is monoecious.

Question 17

Which of the following statements about fruit ripening is an example of positive feedback?

Accepted Answer

A)  Chemical signals increase enzymatic activity in fruit to convert sugars into starches, thicken pulp, and maintain color in the fruit. 
B)  Once seeds reach maturity, chemical signals block enzymatic steps that normally convert sugars into starches, and sugars accumulate from photosynthetic activity within the fruit. 
C)  Chemical signals stimulate enzymatic activities that convert starches into sugars, soften fruit pulp, and produce more chemical signals. 
D)  Chemical signals shut down enzymatic activities that convert starches into sugars, soften fruit pulp, and color change of fruit. 
A)  Chemical signals increase enzymatic activity in fruit to convert sugars into starches, thicken pulp, and maintain color in the fruit. 
B)  Once seeds reach maturity, chemical signals block enzymatic steps that normally convert sugars into starches, and sugars accumulate from photosynthetic activity within the fruit. 
C)  Chemical signals stimulate enzymatic activities that convert starches into sugars, soften fruit pulp, and produce more chemical signals. 
D)  Chemical signals shut down enzymatic activities that convert starches into sugars, soften fruit pulp, and color change of fruit.

Question 18

Which of the following are potential benefits of producing genetically modified crops?
I. create crops that can grow on land previously unsuitable for agriculture
II. create crops with better potential for biofuel production
III. create crops with better nutritional attributes
IV. increase crop yield

Accepted Answer

A)  III only 
B)  III and IV only 
C)  II III and IV only 
D)  I, II, III, and IV 
A)  III only 
B)  III and IV only 
C)  II III and IV only 
D)  I, II, III, and IV

Question 19

The table below shows some of the floral characteristics of four different flower species. Which species, A, B, C, or D, is most likely pollinated by a bat?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 20

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?

Accepted Answer

A)  stigma → style → ovary → micropyle 
B)  stigma → ovary → style → micropyle 
C)  micropyle→ ovary → stigma → style 
D)  ovary → style → stigma → micropyle 
A)  stigma → style → ovary → micropyle 
B)  stigma → ovary → style → micropyle 
C)  micropyle→ ovary → stigma → style 
D)  ovary → style → stigma → micropyle

Exam 38: Reproduction of Flowering Plants

The vast number and variety of flowering plant species is probably related to which of the following?

Which of the following flower parts develops into the pulp of a fleshy fruit?

Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?

What is the typical ploidy of endosperm cells in an angiosperm seed?

Farmers traditionally kept some of the seeds from their best plants in one season to plant the following year. Now that farmers mostly plant hybrid seed this practice is no longer effective because ________.

Which of the following is necessary for a generative cell in a pollen grain to produce two sperm cells?

Which of the following pollinating agents is correctly matched with the type of plant it helps pollinate?

Based on the table below, which species has fruits adapted for dispersal by fruit-eating animals (frugivores)?

Which of the following best describes double fertilization in flowering plants?

Which of the following best describes a selective advantage of retaining the gametophyte within the living sporophyte of land plants?

Which of the following is the strongest environmental argument against the introduction of genetically modified crops?

Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm. 1) ovary 2) ovule 3) egg 4) carpel 5) embryo sac

A hypothetical dye stains sporophyte tissue blue and gametophyte tissue red. What would a researcher most likely observe if a section through the center of a seed was stained with this dye?

"Golden Rice" is a GM crop designed to enhance which of the following traits?

Which of the following is the best argument for pursuing plant biotechnology?

A summer occupation in maize-growing regions is detasseling the maize: removing unwanted male flowers so that female flowers on the same plant are pollinated by the desired pollen for the hybrid maize. Which of the following best describes maize plant flowers?

Which of the following statements about fruit ripening is an example of positive feedback?

The table below shows some of the floral characteristics of four different flower species. Which species, A, B, C, or D, is most likely pollinated by a bat?

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?

Biology and Its Themes

Atoms and Molecules

The Chemistry of Water

Carbon: the Basis of Molecular Diversity

Biological Macromolecules and Lipids

Energy and Life

Cell Structure and Function

Cell Membranes

Cellular Signaling

Cell Respiration

Photosynthetic Processes

Mitosis

Sexual Life Cycles and Meiosis

Mendelian Genetics

Linkage and Chromosomes

Nucleic Acids and Inheritance

Expression of Genes

Control of Gene Expression

Dna Technology

The Evolution of Genomes

How Evolution Works

Phylogenetic Reconstruction

Microevolution

Species and Speciation

Macroevolution

Introduction to Viruses

Prokaryotes

The Origin and Evolution of Eukaryotes

Nonvascular and Seedless Vascular Plants

Seed Plants

Introduction to Fungi

An Introduction to Animal Diversity

Invertebrates

Vertebrates

Plant Structure and Growth

Transport in Vascular Plants

Plant Nutrition

Plant Signals and Behavior

The Animal Body

Chemical Signals in Animals

Animal Digestive Systems

Animal Transport Systems

Animal Excretory Systems

Animal Reproductive Systems

Development in Animals

Animal Defenses Against Infection

Electrical Signals in Animals

Neural Regulation in Animals

Sensation and Movement in Animals

An Overview of Ecology

Behavioral Ecology

Populations and Life History Traits

Biodiversity and Communities

Energy Flow and Chemical Cycling in Ecosystems

Conservation and Global Ecology

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