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 ...