Natural Selection Test

Evolution by natural selection works best on a population having no variation. A. True B. False

b

Traits acquired during an organism's lifetime can be passed down to its offspring. A. True B. False

b

What is a common ancestor? A. an animal that has a lot of offspring B. an animal from which two or more different species evolved C. an animal that is related to many other species D. an animal that is good at escaping from predators

b

Similarities in the structures of two different species provide evidence that the species evolved from a common ancestor. This type of evidence includes similar structures that have different functions. Which of the following pairs of features have a similar structure but have a different function in each organism? A. a dolphin fin and a shark fin B. human fingernails and monkey fingernails C. the front leg of a cat and the wing of a bat D. the wing of a bumble bee and the wing of a bird

c

The beaks of finches found on various Galapagos Island differed based on: A. the size of their island B. the lenght of their wings C. the available food supply D. the predators that hunted them

c

When nature "selects" a variation, that means that the trait: A. Gets passed along from generation to generation B. Causes the population to shrink C. Has brought about a new species D. Helps prey escape predators

c

Which of the following is an example of an environmental pressure? A .The air pressure in the atmosphere B. Breeding between two members of the same species C. A lake that's gradually running out of water D. A fight between two members of the same species

c

________________ is the process of choosing organisms with specific desired traits to be parents. A. selective choice B. selective dominance C. recessive dominance D. selective breeding

d

Evolution is a gradual process. A. True B. False

a

In the phrase "survival of the fittest," the term "fittest" refers to: A. The best-adapted organisms B. The biggest organisms C. The smartest organisms D. The fastest organisms

a

Over a period of years, the average rainfall in an area decreases, causing environmental changes. Which of the following populations would be most likely to survive these environmental changes? A. a population with the greatest amount of genetic variation B. a population with the least amount of genetic variation C. a population that has been altered through artificial selection D. a population with the smallest population size

a

Species change over time through: A. Evolution B. Adaptation C. Extinction D. Genetic Variation

a

Which of the following is a situation that could lead to extinction of a species? A. Drastic changes in the environment. B. Increased habitat. C. Population size increased. D. Food supply avaliable for every member of the specie.

a

Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce? A. natural selection B. overproduction C. competition D. variation

a