Which enzyme is used to bind DNA fragments together?
A) restriction enzyme
B) lysozyme
C) DNA ligase
D) DNA polymerase
C
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Where does perception of sensory stimuli occur?
A. in all receptors B. in highly specialized receptors like hair cells C. at synapses in the peripheral nervous system D. only in the central nervous system
Refer to Figure 44-3. A semilunar valve regulates blood flow into which structures?
a. 1 and 2 b. 1 and 5 c. 1 and 7 d. 2 and 7 e. 7 and 11
Earth once consisted of a single large landmass and one ocean. The landmass is named
A. Panthalassa. B. Pangaea. C. Laurasia. D. Gondwana. E. Ultima Continenta.
You are studying a large tropical reptile that has a high and relatively stable body temperature. How would you determine whether this animal is an endotherm or an ectotherm?
A) You know from its high and stable body temperature that it must be an endotherm. B) You know that it is an ectotherm because it is not a bird or mammal. C) You subject this reptile to various temperatures in the lab and find that its body temperature and metabolic rate change with the ambient temperature. You conclude that it is an ectotherm. D) You note that its environment has a high and stable temperature. Because its body temperature matches the environmental temperature, you conclude that it is an ectotherm.