How old is the earth?

a. 5 billion years old b. 50 billion years oldc. 1 billion years old d. 1 million years old

Early fossilized cells from ~3.8 billion years ago resemble _____ cells from today.

a. eukaryotic b. plant c. fungal d. prokaryotic

What is the cause of the mass extinction that wiped out the dinosaurs?

a. An asteroid slammed into Chicxulub, Mexico

b. A large volcano erupted in Sumatra

c. The earths plates cracked and the reptiles fell to the center of the earth

d. an increase in methane from dinosaur flatulence led to the melting of the polar ice caps which heated the earth

What time period was the last ice age in?

a. Precambrian b. Cenozoic c. Paleozoic d. Mesozoic

All of the following are true EXCEPT?

a. Variations in a population may be inherited

b. Under normal conditions most animals mate randomly

c. Organisms tend to reproduce more offspring than the ecosystem can hold

d. Organisms with better suited alleles survive and reproduce

A human and a chimpanzee both having a common ancestor is an example of

a.sexual selection b.divergent evolution c. convergent evolution d. homologous structures

A shark and whale both swim in the ocean and have a torpedo shaped body, this is an example of?

a.Coevolutionb.divergent evolution c. convergent evolution d. sexual selection

Certain bees only drink the nectar from one type of flower, and that flower is only pollinated by that one type of bee. This is an example of?

a.divergent evolutionb.homologous structures c.convergent evolutiond.coevolution

What is the best example of an analogous structure?

a. A human appendix b. the wing of a bee and the wing of a bird c. A human male heart and a human female heart d. A dog leg and a cat leg

a. A stick bug looks like a stick

b. There are two butterflies, one tastes good, but the other tastes bad. They both look alike

c. Two butterflies look very dissimilar, but they both taste bad

d. There are two butterflies, they both taste bad. They both look alike

Which of the following is not an example of mimicry?

a. only to benefit organisms

c. randomly

b. only to destroy organisms

d. out of necessity

Mutations in organisms occur___.

a. evolve into the same species

c. always go extinct

b. life to diverge and speciation to occur

d. none of the above

As small changes accumulate it could cause two lines to ___

a. extinction

b. Its bill may change sizes as different alleles are more favored

c. obtain nectar from another flower

d. all of the above

e. none of the above

The scarlet honeycreeper used one flower as a source of nectar. This flower was becoming increasingly rare. What may happen to the scarlet honeycreeper?

a. the skin cells of the mother

b. the gametes of either parent

c. all the body cells of both parents

d. only the nerve cells of the father

A chemical known as 5-bromouracil causes a mutation that results in the mismatching of molecular bases in DNA. The offspring of organisms exposed to 5-bromouracil can have mismatched DNA if the mutation occurs in

a. develop many mutated cells

b. become extinct over time

c. begin to reproduce sexually

d. develop resistance to diseases

A species that lacks the variation necessary to adapt to a changing environment will most likely

a. Genetic alterations occur every time cell reproduction occurs.

b. The fossil record provides samples of every organism that ever lived.

c. Populations that have advantageous characteristics will increase in number.

d. Few organisms survive when the environment remains the same

Which statement is best supported by the theory of evolution?

a. environmental selection

b. alteration of DNA molecules

c. selective breedingd. a sudden mutation

The pedigree of Seattle Slew, a racehorse considered by some to be one of the fastest horses that ever lived, includes very fast horses on both his mother’s side and his father’s side. Seattle Slew most likely was a result of

a. releasing more carbon dioxide into the atmosphere

b. reducing the human population

c. decreasing the amount of dissolved oxygen in the oceans

d. reducing the thickness of the ozone layer

Which action would be least likely to harm endangered species?

a. results from isolation of the organism from the rest of the population

b. is due to a genetic code that is present in the gametes of the organism

c. decreases the number of genes in the body cells of the organism

d. causes a change in the environment surrounding the organism

A characteristic that an organism exhibits during its lifetime will only affect the evolution of its species if the characteristic

a. unusual courtship behaviors lead to extinction

b. some organisms are better adapted for asexual reproduction

c. some organisms are better adapted for asexual reproduction

d. behaviors that lead to reproductive success have evolved

A species of bird known as Bird of Paradise has been observed in the jungles of New Guinea. The males shake their bodies and sometimes hang upside down to show off their bright colors and long feathers to attract females. Females usually mate with the “flashiest” males. These observations can be used to support the concept that

a. Different varieties can develop from a single species as a result of the recombination of genetic information.

b. Different species can develop from a single species as a result of the effect of similar environmental conditions.

c. Mutations will occur in the genes of a species only if the environment changes.

d. Variations in a species will increase when the rate of mitosis is decreased

Agriculturists have developed some varieties of vegetables from common wild mustard plants, which reproduce sexually. Which statement best explains the development of these different varieties of vegetables?

a. Species B and C can be found in today’s environments

b. Species A and D evolved from E

c. Species A and C can still interbreed

d. Species A, B, and E all evolved from a common ancestor and all are successful today.

Which statement concerning the evolution of species A, B, C, D, and E is supported by the diagram below?

a. The biodiversity of these areas would not be affected

b. Certain producer organisms would become more abundant in these areas

c. Other manatees would move into these areas and restore the population

d. Predators in these areas would occupy higher levels on the energy pyramid

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in the areas where they had lived?

a. The extinction rate of species has decreased in the last 50 years

b. Many bird species and some butterfly species make annual migrations

c. New varieties of plant species appear more frequently in regions undergoing climatic change

d. Through cloning, the genetic makeup of organisms can be predicted

Which statement provides evidence that evolution is still occurring at the present time?

a. asexual reproduction with a short reproductive cycle

b. sexual reproduction with a short reproductive cycle

c. asexual reproduction with a long reproductive cycle

d. sexual reproduction with a long reproductive cycle

Which reproductive pattern would be associated with a species that is most likely to undergo rapid evolutionary change?

a. identical food preferencesb. structural similaritiesc. identical body sizesd. habitat similarities

The remains of three organisms are shown below. A study of these remains would indicate that these organisms have

Small ground finches and medium ground finches live on an island with abundant plant and animal food. Predict how the small ground finch and the medium ground finch would be affected if warbler finches migrated to the island where these finches live. Support your answer.