1. A population in Hardy-Weinberg equilibrium A) consists of genotype frequencies that are constantly changing. B) is under no selective pressures. C) is very common in nature. D) consists of allele frequencies that are constantly changing. E) requires a small population size. 2. 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 most species undergo little phenotypic change during most of their evolutionary duration. C) It was inspired in part by patterns observed in the fossil record. D) It appears to be well supported by the fossil record. E) It suggests that subgroups diverge and evolve at about equal and constant rates. 3. Animals that possess both male and female sexual organs A) are dioecious and typically self-fertilize. B) are parthenogenetic and typically self-fertilize. C) are dioecious and typically cross-fertilize. D) are hermaphroditic and typically cross-fertilize. E) are hermaphroditic and typically self-fertilize 4. On a molecular level, all organisms A) have the same bases in DNA and RNA, the same amino acids in proteins, but use different genetic codes. B) have the same bases in DNA and RNA, the same amino acids in proteins, and use the same genetic code. C) use different means of storing genetic information. D) have the same bases in DNA and RNA, but different amino acids in proteins. E) show no similarities. 6. Which of the following statements about natural selection is true? A) All individuals within a population have an equal likelihood of survival. Survival is based on chance. B) Natural selection results in those individuals within a population who are best-adapted surviving and producing more offspring. 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 leads to extinction. E) Natural selection causes variations to arise within a population. 8. Which of the following is the best description of an adaptation? A) a trait that will be beneficial in the future B) a trait that is currently beneficial to survival C) a trait that is of no advantage to survival D) an environmental change that selects for certain traits E) a trait that was beneficial to survival in the past 11. Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are A) produced in the testes. B) only produced in female humans. C) produced in the ovaries. D) produced in both male and female humans. E) constantly secreted into the bloodstream of males. 14. Human chorionic gonadotropin (hCG) A) is needed to form the placenta. B) is stored in the ovaries. C) is produced by the amnion. D) acts as a hormone signaling menstruation. E) can be used to reveal pregnancy. 15. Negative feedback loops act to A) cause an erection of the penis when stimulated. B) cause uterine contra ...

1. 1. A population in Hardy-Weinberg equilibrium
A) consists of genotype frequencies that are constantly
changing.
B) is under no selective pressures.
C) is very common in nature.
D) consists of allele frequencies that are constantly changing.
E) requires a small population size.
2. 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 most species undergo little phenotypic
change during most of their evolutionary duration.
C) It was inspired in part by patterns observed in the fossil
record.
D) It appears to be well supported by the fossil record.
E) It suggests that subgroups diverge and evolve at about equal
and constant rates.
3. Animals that possess both male and female sexual organs
A) are dioecious and typically self-fertilize.
B) are parthenogenetic and typically self-fertilize.
C) are dioecious and typically cross-fertilize.
D) are hermaphroditic and typically cross-fertilize.
E) are hermaphroditic and typically self-fertilize
4. On a molecular level, all organisms
A) have the same bases in DNA and RNA, the same amino acids
in proteins, but use different genetic codes.

2. B) have the same bases in DNA and RNA, the same amino acids
in proteins, and use the same genetic code.
C) use different means of storing genetic information.
D) have the same bases in DNA and RNA, but different amino
acids in proteins.
E) show no similarities.
6. Which of the following statements about natural selection is
true?
A) All individuals within a population have an equal likelihood
of survival. Survival is based on chance.
B) Natural selection results in those individuals within a
population who are best-adapted surviving and producing more
offspring.
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 leads to extinction.
E) Natural selection causes variations to arise within a
population.
8. Which of the following is the best description of an
adaptation?
A) a trait that will be beneficial in the future
B) a trait that is currently beneficial to survival
C) a trait that is of no advantage to survival
D) an environmental change that selects for certain traits
E) a trait that was beneficial to survival in the past
11. Luteinizing hormone (LH) and follicle-stimulating hormone
(FSH) are
A) produced in the testes.
B) only produced in female humans.
C) produced in the ovaries.

3. D) produced in both male and female humans.
E) constantly secreted into the bloodstream of males.
14. Human chorionic gonadotropin (hCG)
A) is needed to form the placenta.
B) is stored in the ovaries.
C) is produced by the amnion.
D) acts as a hormone signaling menstruation.
E) can be used to reveal pregnancy.
15. Negative feedback loops act to
A) cause an erection of the penis when stimulated.
B) cause uterine contractions during childbirth.
C) cause milk production after childbirth.
D) control sperm production.
E) cause expulsion of milk during breastfeeding
16. Vestigial organs
A) did not have a function when they first developed, but do so
today.
B) are similar in many organisms.
C) include the human appendix and wisdom teeth and a snake’s
hipbones.
D) are not found in present-day organisms.
E) must have evolved individually in different organisms.
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.
A) Some fossils of extinct organisms are quite different from
living organisms.
B) Even though the limbs of various mammals carry out
different functions (swimming, gliding, running, holding, etc.),
the bone patterns are very similar.
C) The limbs of some mammals serve the same purpose but

4. their bone patterns are very different.
D) As scientists explored more of the earth, they found that
different groups of organisms were found in the different
regions.
E) The platypus is only found in Australia and the dodo was
only found on Madagascar.
20. After being produced in the seminiferous tubules, sperm
mature in the
A) ejaculatory duct.
B) urethra.
C) epididymis.
D) seminal vesicle.
E) vas deferens.