Campbells Biology 12th edition chapter 38 test bank Exam Questions And Answers
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Campbells Biology
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Campbells Biology
Campbells Biology 12th edition chapter 38 test bank Exam Questions And Answers
"Golden Rice" is a GM crop designed to enhance which of the following traits?
A increase resistance to various herbicides, making it practical to weed rice fields with those herbicides
B produce a toxin that reduce...
Answers
"Golden Rice" is a GM crop designed to enhance which of the following traits?
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 -
Answer-D increase vitamin A content, a common dietary deficiency in developing
countries
/.A fruit is ________.
A a mature ovary
B a mature ovule
C a seed plus its integuments
D an enlarged embryo sac - Answer-A a mature ovary
/.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?
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 - Answer-D a blue center,
surrounded by red, inside a blue exterior
/.A pineapple is composed of fused carpels from multiple flowers. Botanically, a
pineapple is which kind of fruit?
A simple
B multiple
C aggregate
D accessory - Answer-B multiple
/.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?
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 - Answer-D)They
have either stamens or carpels and the plant is monoecious
/.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)4, 2, 1, 5, 3
B)5, 4, 3, 1, 2
C)5, 1, 4, 2, 3
D)4, 1, 2, 5, 3 - Answer-4, 1, 2, 5, 3
/.Asexual reproduction can produce offspring more quickly than sexual reproduction; yet
most plants
reproduce sexually in nature. Which of the following best explains why sexual
reproduction is more
prevalent?
A it is more energy efficient than asexual reproduction
B it ensures genetic continuity from parents to offspring
C it recombines alleles, contributing to variation in a species
D it does not depend on other agents for pollination - Answer-C it recombines alleles,
contributing to variation in a species
/.Bt maize ________.
A is resistant to various herbicides, making it practical to weed maize fields with those
herbicides
B contains transgenes that increase vitamin A content
C includes bacterial genes that produce a toxin that reduces damage from insect pests
D is a "boron (B)-tolerant" transgenic variety of maize - Answer-C includes bacterial
genes that produce a toxin that reduces damage from insect pests
/.Cottonwood, aspen, willow trees are dioecious and have flowers without petals that
appear before the
leaves are out in the spring. Based on these observations, what is their likely pollination
strategy?
A Each species has its own specific insect pollinator.
B Early emerging insects cross pollinate these species.
C Their pollen is randomly dispersed by wind.
D These species are self-pollinating. - Answer-C Their pollen is randomly dispersed by
wind.
/.Double fertilization means that ________.
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