Biology - Evolution

Male turkeys are birds that naturally strut and display their large tail feathers, which attracts female turkeys. This display is an example of

A behavioral adaptation

In the early stages of development the embryos of dogs, pigs, and humans resemble one another. This observation suggests that these animals may have

A common ancestry

A study of the position and shape of the bones in the forelimbs of a flying squirrel, a bat, and a beaver showed that the beaver and the flying squirrel appear to be most closely related. This determination was most likely based on a study in the field of comparative

Anatomy

A species that lacks the variation necessary to adapt to a changing environment is more likely to

Become extinct over time

Which individual would have used the theory of natural selection to explain the change in toe structure that occurred in the evolution of the horse?

Darwin

The evolutionary relationship between pigs and humans is supported by observations showing stages of prenatal (before birth) development in these organisms. These observations are most closely associated with the field of comparative

Embryology

A species in a changing environment would have the best chance of survival as a result of a mutation that has a

High adaptive value that occurs in its gametes

A key concept in the modern theory of evolution explains

How variations occur within a species

Lamarck proposed that new organs evolved according to the

Needs of the organism

When penicillin was first introduced, it was very effective in destroying most of the bacteria that cause gonorrhea. Today, certain varieties of this bacterium are resistant to penicillin. Which statement best explains the appearance of these resistant varieties?

Penicillin killed the susceptible bacteria, while naturally resistant varieties survived and reproduced

Fossils would most likely be found in

Sedimentary rocks that are 500 million years old

Antibiotics are substances used to help fight an infection of Streptococcus, a bacterium that causes strep throat. Overuse of these antibiotics can

Select for resistant organisms

Natural selection produces changes most quickly in

Species with short reproductive cycles

Evidence that best supports the theory of biological evolution was obtained from the

Study of fossil records

Survival of at least a few members of a population after a major environmental change is most dependent on

Variations in many different traits in many individuals in the population