Metamorphosis occurs in which of the following vertebrate classes?
a. Chondrichthyes
b. Reptilia
c. Myxiniformes
d. Amphibia
e. Actinistia
D
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The process of nitrification is the conversion of ____
a. N2 ? NH4+ b. NH4+ ? N2 c. N2 ? NO3- d. NO3- ? N2 e. NH4+ ? NO3-
The difference between an epidemic and a pandemic is that ________
a. an epidemic breaks out in several countries at the same time, while a pandemic is a local outbreak b. a pandemic breaks out in several countries at the same time, while an epidemic is restricted to a single country c. an epidemic kills many infected people, while a pandemic sickens many but kills few d. epidemics occur sporadically, while pandemics are chronic diseases of a population
If a gardener cuts the apical meristem of a plant, lateral buds begin to grow, which causes a bushier shape to develop. This is because the apical meristem normally secretes auxins that
A. suppresses the growth of lateral buds. B. suppresses the growth of the apical meristem. C. stimulates the growth of the apical meristem. D. stimulates the growth of lateral buds. E. stimulates the growth of roots.
Stromatolites are rocklike columns composed of:
a. protists b. dinoflagellates c. microbial biofilms d. heterotrophic organisms e. photosynthetic eukaryotes