Evolution

Which of these describes a situation where natural selection could lead to evolution?

• Radiation causes the leaves of sunflowers to curl.

• Predation removes slower antelope from the herd.

• Incubation at warmer temperatures produces female turtles.

• Precipitation at higher rates stimulates the growth of elm trees.

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Which of these best describes the benefit of genetic variation within a species?

• It ensures some organisms can survive an environmental change.

• It occurs even among organisms that are isolated.

• It allows most organisms to find appropriate mates.

• It is energetically inexpensive for organisms to maintain.

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A river changes course so a population of mice is subdivided into two populations. The forest on the eastern side of the stream contains a land predator that is absent on the western side of the stream. Which outcome will most likely occur in the mice populations over many generations?

• Mice on the western side of the stream will have better camouflage.

• Mice on the eastern side of the stream will have a different number of chromosomes.

• The two groups of mice will develop different adaptations.

• The two groups of mice will continue to eat the same food.

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Which set includes kingdoms that contain only heterotrophs?

• Protista, Fungi

• Eubacteria, Animalia

• Plantae, Fungi

• Animalia, Fungi

Which factor determines if two individuals are members of the same species?

• They live in the same habitat and niche.

• They forage and eat the same type of food.

• They mate and produce fertile offspring.

• They are similar in appearance and color.

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Which of the following outcomes would you predict for a population of mosquitoes exposed to a new pesticide?

• Over several generations, the mosquitoes would become resistant to the pesticide.

• Over several generations, the mosquitoes would evolve into several new species.

• Over several generations, the mosquitoes would all be killed and become extinct.

• Over several generations, the mosquitoes would be more susceptible to the pesticide

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Which of these factors should be compared to best determine how closely species are related to each other?

• Number of genes

• Sequence of amino acids

• Physical similarities in body structure

• Location of chromosomes

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A certain cave is full of fish that are blind but still have eyes, this is an example of a ___________ structure.

• analogous

• vestigial

• homologous

• heterozygous

Which of the following best describes the importance of similar amino acid sequencing of a protein in different organisms?

• The sequence of amino acids in a protein does not directly reflect the DNA that encodes the protein.

• The fewer differences in the amino acid sequencing the less closely the organisms will be related.

• Fewer differences in the amino acid sequencing of a protein show a greater evolutionary relatedness..

• The more differences in the amino acid sequencing the fewer mutations have occurred in their DNA.

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Speciation is the formation of new species. What are the two major processes that drive speciation?

• Geographic isolation and reproductive isolation

• Geographic isolation and reproductive success

• Geographic success and reproductive isolation

• Geographic success and reproductive success