Question

21.
Choose the best answer.

Genetic drift, a mechanism of evolution, works better in ______________ populations.

ancient

moving

big

small
22.
Choose the best answer.

It is believed that modern humans are direct descendants of ______.

chimipanzees

Homo erectus

gorillas

Homo neanderthalensis
23.
Choose the best answer.

Contrasting the body structure of different organisms is called ___________________.

radioactive dating

comparative anatomy

paleoanthropology

molecular studies
24.
Choose the best answer.

A branch of biology that deals with classifying and naming organisms is _____.

taxonomy

binomial nomenclature

genus

phylogeny
25.
Choose the best answer.

A species' or population's entire group of alleles is a

.
26.
Choose the best answer.

_________, an evolution mechanism, works better in populations not divided by physical barriers.

Genetic drift

Gene flow

Gene pool

Speciation
27.
Choose the best answer.

Which of these statements defines genetic drift?

the changing frequency of an allele occurring in a population over time

evolutionary mechanism in which an individual from one population is introduced to another population

a species' or population's entire group of alleles

the process of forming a new species from an existing species
28.
Choose the best answer.

Which of these statements defines speciation?

the changing frequency of an allele occurring in a population over time

evolutionary mechanism in which an individual from one population is introduced to another population

a species' or population's entire group of alleles

the process of forming a new species from an existing species
29.
Choose the best answer.

The process of beneficial changes being passed down and harmful changes being weeded out over the generations is _____.

artificial selection

speciation

natural selection

gene pool
30.
Choose the best answer.

Which of the following is the definition of gene flow?

a new individual from one population is introduced to another population in this evolutionary mechanism

the process of forming a new species from an existing species

a species' or population's entire group of alleles

the changing frequency of an allele occurring in a population over time
31.
Choose the best answer.

To classify organisms, today we use a system created by _______.

Stanley Miller

Carl Sagan

Carl Linnaeus

Charles Darwin

Answer 1

21. small
22. Homo erectus
23. comparative anatomy
24. taxonomy
25. gene pool
26. Gene flow
27. the changing frequency of an allele occurring in a population over time
28. the process of forming a new species from an existing species
29. natural selection
30. a new individual from one population is introduced to another population in this evolutionary mechanism
31. Carl Linnaeus