Biology Final 3

Which of the following statements about biological evolution is false?

Features that increase the liklihood of survival and reproduction by an organism in a particular environment are called

In small populations, frequencies of certain alleles may change by chance alone. Such random change in the frequency of alleles is called

The Hardy-Weinberg equilibrium conditions for populations of organisms result in

The ultimate origin of genetic variation is

Natural selection acts on

Which of the following best describes natural selection?

In a hypothetical population of sawflies, 20% of the population is homozygous for allele A and 45% is homozygous for allele a. Assuming that A and a are the only alleles at this locus, what percent of the population is heterozygous?

If a population with 2 alleles is at Hardy-weinberg equilibrium and the grequency of one allele is .7, what is the heterozygote frequency?

Due to various causes, including DDt poisoning, the poulation size of whooping cranes was reduced to about a dozen during the 1970s. The population size has since rebounded, and there are now hundreds of whooping cranes. Which of the following would you not expect to see in whooping cranes.

Which of the following is a benefit of sexual reproduction?

Which of the following phenomena is not an evolutionary mechanism

The observation that different geographical areas sometimes exhibit plant and animal communities of similar apperance, even though the indiviual plants and animals are not closely relatied, is called

The evolutionary relationship amoung organisms is known as

A taxon that includes a common ancestor, all descendants of that ancestor, and no other organisms is considered to be