Most chordates are ________
A) invertebrates
B) vertebrates
C) insects
D) None of the above
B
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You wish to inhibit the contraction of muscle in vitro as a control for an experiment you are conducting. To do this, which of the following would you use?
A) dyneinase B) ATPase inhibitors C) mysoinase II D) contractionase E) serotonin
How does a four chambered heart allow for different blood pressure to exist in the pulmonary and systemic circuits? Why is this important?
What will be an ideal response?
Some ecologists have proposed that gaps created by disturbances lead to habitat heterogeneity, which, in turn, leads to the coexistence of greater numbers of tree species in tropical habitats, as compared to temperate habitats. Which of the following hypotheses is most closely associated with this proposal?
A) Red Queen hypothesis D) intermediate disturbance hypothesis B) character displacement hypothesis E) energy-diversity hypothesis C) Hamilton-Zuk hypothesis
Which glands function to keep the skin and hair soft?
Sebaceous glands Sweat glands Arrector pili Endocrine