Multiple Choice Quizzes - Life Sciences

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Question 1

Random changes in gene frequency that occur in small populations describes the concept of

	A.	convergent evolution.
	B.	sympatric speciation.
	C.	parapatric speciation.
	D.	adaptive radiation.
	E.	genetic drift.

5 points

Question 2

Immature eggs are called

	A.	oocytes.
	B.	blastocysts.
	C.	basal cells.
	D.	follicles.
	E.	ovaries.

5 points

Question 3

Embryonic development includes all of the following except

	A.	cleavage.
	B.	organogenesis.
	C.	fertilization.
	D.	gastrulation.
	E.	growth.

5 points

Question 4

Negative feedback loops act to

	A.	control sperm production.
	B.	cause an erection of the penis when stimulated.
	C.	cause expulsion of milk during breastfeeding.
	D.	cause uterine contractions during childbirth.
	E.	cause milk production after childbirth.

5 points

Question 5

The primary male hormone is

	A.	estrogen.
	B.	produced throughout a male’s entire lifetime.
	C.	only involved in sperm production.
	D.	produced in the brain.
	E.	testosterone.

5 points

Question 6

Which of the following is the best description of an adaptation?

	A.	an environmental change that selects for certain traits
	B.	a trait that is of no advantage to survival
	C.	a trait that was beneficial to survival in the past
	D.	a trait that will be beneficial in the future
	E.	a trait that is currently beneficial to survival

5 points

Question 7

Most mutations lead to a decreased chance of survival for the mutant organism. Rarely, a mutation can provide an increased chance of survival. These rare mutations provide a(n) _____________________ for the mutant.

	A.	environmental susceptibility
	B.	directional shift
	C.	adaptive
	D.	selective advantage
	E.	selective disadvantage

5 points

Question 8

On a molecular level, all organisms

	A.	have the same bases in DNA and RNA, the same amino acids in proteins, and use the same genetic code.
	B.	use different means of storing genetic information.
	C.	have the same bases in DNA and RNA, but different amino acids in proteins.
	D.	show no similarities.
	E.	have the same bases in DNA and RNA, the same amino acids in proteins, but use different genetic codes.

5 points

Question 9

A population in Hardy-Weinberg equilibrium

	A.	consists of allele frequencies that are constantly changing.
	B.	is very common in nature.
	C.	consists of genotype frequencies that are constantly changing.
	D.	is under no selective pressures.
	E.	requires a small population size.

5 points

Question 10

Animals that possess both male and female sexual organs

	A.	are dioecious and typically self-fertilize.
	B.	are hermaphroditic and typically self-fertilize.
	C.	are hermaphroditic and typically cross-fertilize.
	D.	are parthenogenetic and typically self-fertilize.
	E.	are dioecious and typically cross-fertilize.

5 points

Question 11

Vestigial organs

	A.	must have evolved individually in different organisms.
	B.	include the human appendix and wisdom teeth and a snake’s hipbones.
	C.	did not have a function when they first developed, but do so today.
	D.	are similar in many organisms.
	E.	are not found in present-day organisms.

5 points

Question 12

After being produced in the seminiferous tubules, sperm mature in the

	A.	vas deferens.
	B.	epididymis.
	C.	ejaculatory duct.
	D.	seminal vesicle.
	E.	urethra.

5 points

Question 13

Which of the following is not true of the punctuated equilibrium theory?

	A.	It proposes that most evolutionary change is concentrated in relatively brief episodes of change.
	B.	It suggests that subgroups diverge and evolve at about equal and constant rates.
	C.	It suggests that most species undergo little phenotypic change during most of their evolutionary duration.
	D.	It was inspired in part by patterns observed in the fossil record.
	E.	It appears to be well supported by the fossil record.

5 points

Question 14

Human chorionic gonadotropin (hCG)

	A.	acts as a hormone signaling menstruation.
	B.	is produced by the amnion.
	C.	can be used to reveal pregnancy.
	D.	is needed to form the placenta.
	E.	is stored in the ovaries.

5 points

Question 15

Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are

	A.	only produced in female humans.
	B.	produced in both male and female humans.
	C.	produced in the testes.
	D.	produced in the ovaries.
	E.	constantly secreted into the bloodstream of males.

5 points

Question 16

Chemical compounds secreted by mammals and insects to communicate sexual readiness are called

	A.	hormones.
	B.	estrogens.
	C.	testosterones.
	D.	pheromones.
	E.	developers.

5 points

Question 17

Which of the following statements about natural selection is true?

	A.	Natural selection causes variations to arise within a population.
	B.	Natural selection leads to increased likelihood of survival for certain individuals based on variation. The variation must come from outside the population.
	C.	All individuals within a population have an equal likelihood of survival. Survival is based on chance.
	D.	Natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring.
	E.	Natural selection leads to extinction.

5 points

Question 18

As opposed to external fertilization, internal fertilization ensures that

	A.	sperm and egg will be released simultaneously.
	B.	the number of sperm and eggs produced will be equal.
	C.	sperm will be protected until they can unite with the eggs.
	D.	only the fittest of sperm and egg combinations will survive.
	E.	all of the sperm will fertilize eggs.

5 points

Question 19

This type of selection favors both extremes of the phenotype spectrum within a population.

	A.	stabilizing
	B.	directional
	C.	disruptive
	D.	natural
	E.	neutral

5 points

Question 20

Up until the late eighteenth and early nineteenth centuries, many naturalists believed that all species of living organism(s) had been created separately and had remained unchanged since the creation. Around that time, scientific research provided findings that were contradictory to that idea. All of the following are findings that contradict the idea of a single creation. Choose the exception.

	A.	As scientists explored more of the earth, they found that different groups of organisms were found in the different regions.
	B.	Some fossils of extinct organisms are quite different from living organisms.
	C.	The limbs of some mammals serve the same purpose but their bone patterns are very different.
	D.	Even though the limbs of various mammals carry out different functions (swimming, gliding, running, holding, etc.), the bone patterns are very similar.
	E.	The platypus is only found in Australia and the dodo was only found on Madagascar.