What has been a consequence of the disease caused by the chytrid Batrachochytrium dendrobatidis?
a. the extinction of many species of frogs
b. the killing of trees in temperate forests
c. sexual transmission in humans
d. the killing of millions of humans each year
Ans: a. the extinction of many species of frogs
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The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies
a. True b. False Indicate whether the statement is true or false
On a regional level, coastal areas generally experience ____ fluctuations in temperature compared to interior regions
of landmasses.
a. smaller daily but larger seasonal b. larger daily but smaller seasonal c. only larger daily d. smaller daily and seasonal e. larger daily and seasonal
The only group of plants that produce flowers
are the
a. horsetails. b. ferns. c. bryophytes. d. angiosperms. e. gymnosperms
The pH of the solution in which an enzyme-controlled reaction takes place
A. is not important, since enzymes work well at a variety of pH levels. B. is important, because changing the pH changes the shape of the enzyme. C. is important, because changing the pH increases the temperature and the enzyme is denatured. D. alters the substrate and, therefore, prevents the enzyme from attaching to the substrate.