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Exam 1: A View of Life

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Question 21

Multiple Choice

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Richard is an avid gardener who spends a lot of time caring for the plants in his garden. To minimize damage from pests from his garden, Richard uses a pesticide spray. At first the spray is very effective and kills off most of the insects that he sees on his vegetable plants. However, after a few years of using the same pesticide, he notices that some insects are surviving and continuing to eat his plants. The constant use of pesticides by Richard has led to genetic changes in the population over many generations. This is an example of

A) homeostasis.
B) evolution.
C) mutation.
D) a gene.
E) a behavior.

F) A) and E)
G) A) and D)

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Question 22

Multiple Choice

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Refer to the figure below. How many different kingdoms are represented in this figure?

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

F) C) and D)
G) B) and E)

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Question 23

Multiple Choice

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Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture- both large-scale and small-scale farms as well as from suburbs. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often had deformed gonads. These changes can lead to sterile males or changes in behavior that prevent mating from occurring. At the end of their study, scientists stated that they had supported their theory that agricultural chemicals cause deformities.

Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture- both large-scale and small-scale farms as well as from suburbs located far from agricultural sites. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often had deformed gonads. These changes can lead to sterile males or changes in behavior that prevent mating from occurring. Based on this study, what is the control group?

All of the following are true with respect to DNA except

A pond ecosystem includes small water fleas which feed on submerged aquatic plants. When the water fleas die, they sink to the bottom of the pond where they decompose with the help of bacteria. List in order the producer, decomposer, and consumer in this system.

Which of the following correctly lists the classification categories from least to most inclusive?

Robert, an aspiring scientist in a biology class, wanted to conduct a study on the effects of cigarette smoke on the web-building ability of spiders. Which of the following statements is an incorrect use of terms pertaining to the scientific method?

Managing emerging diseases such as SARS is just one of the many challenges facing science today.

Which of the following is matched incorrectly?

Prokaryotes belong to ________

Geese are known to use the magnetic field of the Earth in navigating their twice yearly migrations. This is an example of which characteristic of life?

Which of the following is not true about ecosystems?

The beaks of birds are well suited to the type of food they eat. This result arises from

Why is evolution an important process for living things?

Which of the following classification categories for humans is not correct?

Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture- both large-scale and small-scale farms as well as from suburbs. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often had deformed gonads. These changescan lead to sterile males or changes in behavior that prevent mating from occurring. Which of the following statements would be considered a hypothesis for this study?

Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture- both large-scale and small-scale farms as well as from suburbs. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often had deformed gonads. These changes can lead to sterile males or changes in behavior that prevent mating from occurring. In this study, what is the genus of the study animal?

Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in its web. Later that day, a bird eats the spider. Based on the organisms involved in this study, what level of organization is he studying?

As fall approaches, white-tailed deer begin to accumulate a layer of body fat. This is an example of which characteristic of life?