資訊推薦

• 20. What are prions?(A)mobile segments of DNA(B)tiny molecules of RNA that infect plants(C) misfolde
• 21. The reason for using Taq polymerase for PCR is that(A)only minute amounts are needed for each cy
• 22. Why might the cricket genome have 11 times more base pairs than that of fruit fly?(A)The two ins
• 23. What characteristic of short tandem repeat DNA makes it useful for DNA fingerprinting?(A)The num
• 24. What is the correct sequence of the following events, under the influence of natural selection?1
• 25. In peas, a gene controls flower color such that R = purple and r = white. In an isolated pea pat
• 28. The chloroplasts of all of the following are thought to be derived from ancestral red algae, exc
• 26. The recessive allele that causes phenylketonuria (PKU) is harmful. What maintains the presence o
• 27. Which eukaryotic kingdom is polyphyletic, and therefore unacceptable, based on cladistics?(A)Mon
• 29. Plastids that are surrounded by more than two membranes are evidence of(A)origin of the plastids
• 30. The following are all adaptations to life on land except(A)cuticles(B)tracheids(C)seeds(D)reduce
• 31. How have fruits contributed to the success of angiosperms?(A)by nourishing the plants that make
• 32. What do fungi and arthropods have in common?(A)Both groups have cell walls.(B)Both groups are co
• 34. A plant seedling bends toward sunlight because(A)there is more auxin on the light side of the st
• 33. Why is the amniotic egg considered an important evolutionary breakthrough?(A)It has a shell that
• 36. The sodium-potassium pump of neurons pumps(A)Na+and K+out of the cell.(B)Na+and K+into the cell.
• 35. Which of the following is an example of positive feedback control in homeostasis?(A)During the b
• 38. You turn on the shower and check the water temperature with your hand. Your brain is able to mon
• 39. What is the primary function of the transverse tubules?(A)Form cross-bridges between actin and m
• 37. Which of the following are not important in chemical synapses?(A)gap junctions(B)secretory vesic
• 41. Diving mammals like whales and seals experience frequent periods when they are not able to breat
• 40. Which of the following is not a reason respiration in water is challenging?(A)Water is very dens
• 42. Consider a tadpole becoming a toad. You would expect to find it changing its form of nitrogenous
• 43. All of the following are functions of the mammalian kidney except(A)water retention(B)filtration
• 44. Which of the following has both endocrine and exocrine activity?(A)the pituitary gland(B)parathy