Changes In Gene Frequency In Small Populations

Changes In Gene Frequency That Occur In Small Populat

Question 1random Changes In Gene Frequency That Occur In Small PopulatQuestion 1random Changes In Gene Frequency That Occur In Small Populat

QUESTION 1 Random changes in gene frequency that occur in small populations describes the concept of

A. sympatric speciation.

B. parapatric speciation.

C. convergent evolution.

D. genetic drift.

E. adaptive radiation.

QUESTION 2 Animals that possess both male and female sexual organs

A. are dioecious and typically self-fertilize.

B. are hermaphroditic and typically cross-fertilize.

C. are dioecious and typically cross-fertilize.

D. are parthenogenetic and typically self-fertilize.

E. are hermaphroditic and typically self-fertilize.

QUESTION 3 Immature eggs are called

A. blastocysts.

B. basal cells.

C. follicles.

D. oocytes.

E. ovaries.

QUESTION 4 On a molecular level, all organisms

A. use different means of storing genetic information.

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

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

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

E. show no similarities.

QUESTION 5 The primary male hormone is

A. only involved in sperm production.

B. produced in the brain.

C. testosterone.

D. estrogen.

E. produced throughout a male’s entire lifetime.

QUESTION 6 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. Even though the limbs of various mammals carry out different functions (swimming, gliding, running, holding, etc.), the bone patterns are very similar.

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

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

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

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

QUESTION 7 A population in Hardy-Weinberg equilibrium

A. requires a small population size.

B. is under no selective pressures.

C. consists of genotype frequencies that are constantly changing.

D. consists of allele frequencies that are constantly changing.

E. is very common in nature.

QUESTION 8 Human chorionic gonadotropin (hCG)

A. is produced by the amnion.

B. is needed to form the placenta.

C. acts as a hormone signaling menstruation.

D. can be used to reveal pregnancy.

E. is stored in the ovaries.

QUESTION 9 Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are

A. produced in both male and female humans.

B. constantly secreted into the bloodstream of males.

C. only produced in female humans.

D. produced in the testes.

E. produced in the ovaries.

QUESTION 10 This type of selection favors both extremes of the phenotype spectrum within a population.

A. disruptive

B. neutral

C. stabilizing

D. directional

E. natural

QUESTION 11 Vestigial organs

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

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

C. must have evolved individually in different organisms.

D. are not found in present-day organisms.

E. are similar in many organisms.

QUESTION 12 Which of the following statements about natural selection is true?

A. Natural selection leads to extinction.

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

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

D. Natural selection causes variations to arise within a population.

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

QUESTION 13 Negative feedback loops act to

A. cause an erection of the penis when stimulated.

B. cause expulsion of milk during breastfeeding.

C. control sperm production.

D. cause uterine contractions during childbirth.

E. cause milk production after childbirth.

QUESTION 14 After being produced in the seminiferous tubules, sperm mature in the

A. urethra.

B. ejaculatory duct.

C. seminal vesicle.

D. vas deferens.

E. epididymis.

QUESTION 15 Embryonic development includes all of the following except

A. growth.

B. cleavage.

C. organogenesis.

D. gastrulation.

E. fertilization.

QUESTION 16 Which of the following is the best description of an adaptation?

A. a trait that was beneficial to survival in the past

B. a trait that will be beneficial in the future

C. a trait that is currently beneficial to survival

D. a trait that is of no advantage to survival

E. an environmental change that selects for certain traits

QUESTION 17 Chemical compounds secreted by mammals and insects to communicate sexual readiness are called

A. estrogens.

B. pheromones.

C. hormones.

D. testosterones.

E. developers.

QUESTION 18 As opposed to external fertilization, internal fertilization ensures that

A. only the fittest of sperm and egg combinations will survive.

B. all of the sperm will fertilize eggs.

C. the number of sperm and eggs produced will be equal.

D. sperm and egg will be released simultaneously.

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

QUESTION 19 Which of the following is not true of the punctuated equilibrium theory?

A. It appears to be well supported by the fossil record.

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

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

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

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

QUESTION 20 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)

A. selective disadvantage

B. environmental susceptibility

C. adaptive

D. directional shift

E. selective advantage