NC Biology Evolution Review

True or False, in the early history of Earth, there was no oxygen present in the atmosphere

• True

• False

Select all that apply. Endosymbiotic Theory presents an explanation as to why _____ and ______ are present in eukaryotic cells.

• Mitochondria

• Chloroplasts

• Nucleus

• Cytoplasm

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Which substance do biochemists often search for in fossils to help better understand the evolutionary relationships of the organism that formed the fossil?

• ATP

• DNA

• Iron

• Oxygen

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Some marine worms and mollusks go through similar larval stages during development. Which can be inferred about their relationship?

• they share a common ancestor

• they can mate with each other

• they compete for habitat

• they share a food source

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Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor. Which would be responsible for this evolutionary change?

• artificial selection

• asexual reproduction

• sexual competition

• geographic isolation

Which statement best describes natural selection?

• As the weather changes, organisms that are able to find shelter need less

  energy to live

• Organisms that eat only plants need less food than organisms that eat animals

• Organisms better adapted to their environment are more likely to reproduce and pass on their traits to their offspring.

• Small organisms are more likely to survive than larger organisms.

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An antibiotic which was effective 20 years ago against a specific type of bacterial infection no longer works against the same kind of infection today. Which best explains why the antibiotic is no longer as effective as it was 20 years ago?

• Bacteria resistant to the antibiotic have killed off nonresistant bacteria.

• Viruses have changed the structure of the bacteria that causes the infection.

• Resistant bacteria have survived and reproduced at a greater rate than nonresistant bacteria.

• The human body has developed an immunity to the antibiotics

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An insecticide kills most of the ants on a plant. Over time, it is determined that the insecticide is not as effective for killing ants. Which statement best explains this observation?

• The ants killed initially by the insecticide were genetically the same as the surviving ants

• The ants killed initially by the insecticide had thinner cell membranes than the surviving ants.

• The ants that survived were younger than those that died as a result of the insecticide.

• The ants killed by the insecticide and the surviving ants were genetically different.

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True or false, Evolution acts on populations not individuals

• True

• False

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Which of the following does not provide evidence for evolution?

• Fossils

• Homologous Structures

• Similar Embryonic Development

• Shared Behaviors