26. Assume that excessive consumption of ethanol increases the influx of negative chloride ions into
27. Which is one of the two laws of inheritance identified by Mendel?(A) The law of priority. (B) Th
30. Which of the following represents a difference between viruses and viroids?(A) Viruses contain i
31. What may lead to alternations of chromosome number?(A) nondisjunction during meiosis. (B) hybrid
32. A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate li
33. The chain lengths in food webs are limited by(A) the amount of energy such as sunlight available
34. _________ is the ability of a community or ecosystem to maintain structure in the face of potent
35. Some bacteria are metabolically active in hot springs because(A) they are able to maintain a coo
36. The Shannon diversity index is a measure of(A) the number of different species in a community.(B
37. Divergence in morphology that is a result of competition between species is termed(A) competitiv
38. When each female in the population mates with several males, but each male mates with only one f
39. Which of the following cannot be determined using a fecundity schedule combined with a life tabl
41. A community is defined as(A) a group of organisms that all make their living in a similar way.(B
42. ________species are those that, despite low biomass, exert strong effects on community structure
43. The equilibrium model of island biogeography explains diversity on islands as a balance between(
44. The study of the relationship between climate and the timing of ecological events is called(A) e
45. In general, reptiles are considered to be a/an .(A) poikilotherm (B) homeotherm (C) endotherm(D)
46. El Niño events(A) occur when the Southern Oscillation index is high.(B) occur when barometric pr
47. Mycorrhizal fungi (directly) help their plant partners acquire(A) sugars. (B) sunlight. (C) seed