QUESTION 1 As opposed to external fertilization, internal fertilization ensures

Question

QUESTION 1

As opposed to external fertilization, internal fertilization ensures that

sperm will be protected until they can unite with the eggs.

only the fittest of sperm and egg combinations will survive.

the number of sperm and eggs produced will be equal.

all of the sperm will fertilize eggs.

sperm and egg will be released simultaneously.

5 points   

QUESTION 2

The primary male hormone is

only involved in sperm production.

produced in the brain.

produced throughout a male’s entire lifetime.

estrogen.

testosterone.

5 points   

QUESTION 3

Negative feedback loops act to

cause expulsion of milk during breastfeeding.

cause an erection of the penis when stimulated.

cause uterine contractions during childbirth.

control sperm production.

cause milk production after childbirth.

5 points   

QUESTION 4

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

constantly secreted into the bloodstream of males.

produced in the ovaries.

only produced in female humans.

produced in the testes.

produced in both male and female humans.

5 points   

QUESTION 5

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

It was inspired in part by patterns observed in the fossil record.

It proposes that most evolutionary change is concentrated in relatively brief episodes of change.

It appears to be well supported by the fossil record.

It suggests that subgroups diverge and evolve at about equal and constant rates.

It suggests that most species undergo little phenotypic change during most of their evolutionary duration.

5 points   

QUESTION 6

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

sympatric speciation.

genetic drift.

parapatric speciation.

convergent evolution.

adaptive radiation.

5 points   

QUESTION 7

On a molecular level, all organisms

have the same bases in DNA and RNA, the same amino acids in proteins, but use different genetic codes.

have the same bases in DNA and RNA, the same amino acids in proteins, and use the same genetic code.

show no similarities.

use different means of storing genetic information.

have the same bases in DNA and RNA, but different amino acids in proteins.

5 points   

QUESTION 8

A population in Hardy-Weinberg equilibrium

requires a small population size.

is very common in nature.

is under no selective pressures.

consists of allele frequencies that are constantly changing.

consists of genotype frequencies that are constantly changing.

5 points   

QUESTION 9

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

developers.

testosterones.

estrogens.

pheromones.

hormones.

5 points   

QUESTION 10

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

directional

stabilizing

natural

disruptive

neutral

5 points   

QUESTION 11

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

a trait that will be beneficial in the future

an environmental change that selects for certain traits

a trait that is currently beneficial to survival

a trait that is of no advantage to survival

a trait that was beneficial to survival in the past

5 points   

QUESTION 12

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

ejaculatory duct.

urethra.

seminal vesicle.

vas deferens.

epididymis.

5 points   

QUESTION 13

Human chorionic gonadotropin (hCG)

acts as a hormone signaling menstruation.

is needed to form the placenta.

is produced by the amnion.

can be used to reveal pregnancy.

is stored in the ovaries.

5 points   

QUESTION 14

Animals that possess both male and female sexual organs

are dioecious and typically cross-fertilize.

are hermaphroditic and typically self-fertilize.

are hermaphroditic and typically cross-fertilize.

are dioecious and typically self-fertilize.

are parthenogenetic and typically self-fertilize.

5 points   

QUESTION 15

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.

selective disadvantage

selective advantage

directional shift

adaptive

environmental susceptibility

5 points   

QUESTION 16

Vestigial organs

are not found in present-day organisms.

did not have a function when they first developed, but do so today.

must have evolved individually in different organisms.

are similar in many organisms.

include the human appendix and wisdom teeth and a snake’s hipbones.

5 points   

QUESTION 17

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.

Some fossils of extinct organisms are quite different from living organisms.

As scientists explored more of the earth, they found that different groups of organisms were found in the different regions.

The platypus is only found in Australia and the dodo was only found on Madagascar.

Even though the limbs of various mammals carry out different functions (swimming, gliding, running, holding, etc.), the bone patterns are very similar.

The limbs of some mammals serve the same purpose but their bone patterns are very different.

5 points   

QUESTION 18

Which of the following statements about natural selection is true?

Natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring.

Natural selection leads to increased likelihood of survival for certain individuals based on variation. The variation must come from outside the population.

Natural selection leads to extinction.

All individuals within a population have an equal likelihood of survival. Survival is based on chance.

Natural selection causes variations to arise within a population.

5 points   

QUESTION 19

Embryonic development includes all of the following except

fertilization.

cleavage.

organogenesis.

growth.

gastrulation.

5 points   

QUESTION 20

Immature eggs are called

ovaries.

follicles.

basal cells.

blastocysts.

oocytes.

A.

sperm will be protected until they can unite with the eggs.

B.

only the fittest of sperm and egg combinations will survive.

C.

the number of sperm and eggs produced will be equal.

D.

all of the sperm will fertilize eggs.

E.

sperm and egg will be released simultaneously.

Explanation / Answer

1. A. sperm will be protected until they can unite with the eggs.

2. E. testosterone.

3. D. control sperm production

and control the menstrual cycle

4. E. produced in both male and female humans.

Explanation:- Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are calledgonadotropins because stimulate the gonads - in males, the testes, and in females, the ovaries. They are not necessary for life, but are essential for reproduction.

5. D. It suggests that subgroups diverge and evolve at about equal and constant rates.

6. B. genetic drift.

7. B. have the same bases in DNA and RNA, the same amino acids in proteins, and use the same genetic code.

8. C. is under no selective pressures.

9. D. pheromones.

10. D. disruptive

11. C. a trait that is currently beneficial to survival

12. E. epididymis.

13. B. is needed to form the placenta.

14. C. are hermaphroditic and typically cross-fertilize.

Explanation:-Organism that has both male and female sex organs. Hermaphroditism is the norm in such species as earthworms and snails, and is common in flowering plants. Cross-fertilization is common among hermaphrodites, with the parents functioning as male and female simultaneously, or as one or the other sex at different stages in their development.

15. A. selective disadvantage

16. E. include the human appendix and wisdom teeth and a snake’s hipbones.

17. E. The limbs of some mammals serve the same purpose but their bone patterns are very different.

18. A. Natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring.

19. A. fertilization.

20. E. oocytes.

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