Answer Happy

45. Point mutations fall into two general categories: a) depurination / deamination b) radiation chemical c) base-pair substitution/base-pair insertions or deletions d) ionizing mutations non-ionizing mutations 46. Base-pair insertions or deletions, if one or more base pairs are added or deleted leads to a) frameshift mutation b) purination mutation c) amination mutation d) ionizing mutation 47. Most present day geneticists believe that variation among organisms resulted from random mutations that sometimes happen to be adaptive a) true b) false 48. Non Ionizing radiation does not induce mutations except for a) ultrasound b) microwave c) fluorescent light d) ultraviolet light 49. This is an invisible, inert radioactive gas with no smell or taste, it is the second most frequent cause of lung cancer after cigarette smoking a) carbon dioxide b) helium ) radon d) zenon