Question

After reading an essay written by ________, both Charles Darwin and Alfred Wallace became aware of the potential for populations to increase beyond their environment’s capacity to provide for all individuals, resulting in competition for survival.

	a.	Charles Lyell
	b.	Thomas Malthus
	c.	Jean-Baptiste Lamarck
	d.	Aristotle

1 points   

QUESTION 2

When natural selection is operating, which of the following phenomena is likely to occur?

	a.	Mutations that occur in one of an organism’s cells will gradually spread to the rest of the cells.
	b.	The evolution of a population will be driven by random natural events.
	c.	The characteristics of individuals within a population will evolve during their lifetime.
	d.	Some individuals within a population will have greater reproductive success than others.

1 points   

QUESTION 3

Refer to Figure 14.30 in the textbook. What do all of these birds have in common?

	a.	They all live in Africa.
	b.	They are all descended from a common ancestor.
	c.	They are products of artificial selection.
	d.	Their geographic distribution can be explained by plate tectonics.

1 points   

QUESTION 4

One common criticism about evolution is that the actual process of evolutionary change has never been observed. How might an evolutionary biologist respond to this criticism?

	a.	Biologists routinely observe and document genetic changes in populations; peppered moths and cliff swallows are just two of hundreds of examples.
	b.	Prehistoric peoples living in North America observed the gradual changes in the horse and documented these changes in cave paintings.
	c.	Mutation, which is the source of genetic variation, produces variability that is too small to be measured, however, given enough time the accumulation of such small changes will become evident.
	d.	Biologists are confident that evolution occurs, however, the time required for evolutionary change is much longer than the human life span.

1 points   

QUESTION 5

Genetic variation is based on

	a.	the accumulation of mutations in somatic cells (as opposed to gametes).
	b.	differences in DNA sequences between the individuals in a population.
	c.	the formation of new combinations of alleles during asexual reproduction.
	d.	the inheritance of alleles that are accumulated during an individual’s lifetime.

1 points   

QUESTION 6

Among individuals in a population, the ultimate source of heritable differences that drive natural selection is

	a.	industrial pollution.
	b.	gene flow.
	c.	continental drift.
	d.	gene mutation.

1 points   

QUESTION 7

Which of the following statements best describes what happens in gene flow?

	a.	Chance events alter a population’s gene pool.
	b.	New individuals that join a population contribute their alleles to its gene pool.
	c.	Alleles that make an individual more successful move from one population to another.
	d.	Crossing-over creates new combinations of alleles during gamete formation.

1 points   

QUESTION 8

Biological evolution is best defined as

	a.	changes in any characteristics of a population over time.
	b.	the characteristics that improve a particular organism’s chances of survival.
	c.	random oscillations in the genetic makeup of a population.
	d.	the change in the allele frequencies of a gene pool over time.

1 points   

QUESTION 9

The evolutionary effects of genetic drift are

	a.	usually random and unpredictable.
	b.	shaped by nonrandom selective forces.
	c.	indistinguishable from those produced by natural selection.
	d.	most obvious in large populations.

1 points   

QUESTION 10

With which of the following statements would Darwin be most likely to DISAGREE?

	a.	Natural selection is the mechanism by which biological evolution takes place.
	b.	Evolution is best viewed as a purposeful and directed change over time.
	c.	The fossil record supports the view that biological evolution has occurred.
	d.	Individuals within a population vary in the characteristics they possess.

Answer 1

1. After reading an essay written by THOMAS MALTHUS , both Charles Darwin and Alfred Wallace became aware of the potential for populations to increase beyond their environment’s capacity to provide for all individuals, resulting in competition for survival. The pattern of growth of the component also vary according to the environment they live in.

When natural selection is operating, then, Some individuals within a population will have greater reproductive success than others. As a result of which they will have better rate of survival.

Option D is correct

3. The characteristics common in all thr birds is that they are the descendents from the same ancestors.

4. One common criticism about evolution is that the actual process of evolutionary change has never been observed. Then, an to respond to this criticism the biologists routinely observe and document genetic changes in populations; peppered moths and cliff swallows are just two of hundreds of examples.

Option A is correct

5. Genetic variation is based on the differences in DNA sequences between the individuals in a population.

Every person has a unique DNA sequence (VNTRs)

6.Among individuals in a population, the ultimate source of heritable differences that drive natural selection is the gene flow

8. Biological evolution is best defined as the the change in the allele frequencies of a gene pool over time.

10. Darwin would be most likely to DISAGREE with the statement that Evolution is best viewed as a purposeful and directed change over time.