Which of the following is(are) an important
influence(s) on the evolution of mammals?
a. continental movement
b. geographic isolation
c. competition between species
d. decline of the dinosaurs
e. all of these
E
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Which of the following correctly lists the types of cellular communication from shortest to longest distance travelled by the signaling molecule to reach its responding cell?
A. paracrine, autocrine, endocrine B. autocrine, endocrine, paracrine C. autocrine, paracrine, endocrine D. endocrine, paracrine, autocrine
Toward the end of the Proterozoic eon, multicellular animals emerged. The first animals were
A. Fish. B. Reptiles. C. Invertebrates. D. Chordates. E. Tetrapods.
Microparasites are usually characterized by
A) a large body size. B) a long generation time. C) a long time of infection relative to the host's expected life span. D) direct transmission from one host to another.
Blood pressure is the measure of pressure in a large artery and is recorded as two numbers (120/80). These numbers stand for the pressure
A. while the heart is contracting over the pressure while the heart is relaxed. B. while the subject is exercising over the pressure while at rest. C. while the heart is relaxed over the pressure while the heart is contracting. D. in the pulmonary system over the pressure in the systemic system.