Lobsters and clams have _____ in common with fishes
a. external gills
b. a two-chambered heart
c. internal gills
d. skin as a respiratory surface
e. an open circulatory system
ANSWER: c
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An epidemic is
A. a disease that maintains a steady low-level frequency. B. a sudden increase in the occurrence of a disease above the expected level. C. a sudden unexpected occurrence of a disease in a limited segment of a population. D. when a disease occurs occasionally and at erratic intervals in the human population.
Which of the following has an anticodon to bind to the protein synthesizing machinery?
a. DNA b. mRNA c. rRNA d. tRNA e. none of these
All organisms fit into one of the two following
categories.
a. consumers and decomposers b. producers and decomposers c. producers and consumers d. scavengers and detritivores e. consumers and scavengers
Suppose you are examining the processes of muscle contraction in fishes. What type of study is this an example of?
a. an ecological study b. an anatomical study c. a taxonomic study d. a physiological study