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