An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, was well-formed, and had four chambers, with no connection between the right and left sides
A reasonable conclusion supported by these observations is that the _____. A) animal had evolved from birds
B) animal was endothermic and had a high metabolic rate
C) animal was most closely related to alligators and crocodiles
D) species had little to no need to regulate blood pressure
B
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Skeletal muscle can operate anaerobically for short periods, producing ________ and a small amount of ATP
a. lactate b. pyruvate c. creatine d. phosphate
There is a homeostatic or regulatory mechanism that turns appetite and metabolism high or low to maintain the "fat set point." This mechanism is influenced by which of the following?
A) the aroma of food cooking stimulating salivation B) the amount of time since your last meal C) a hormone called leptin D) using more calories than you eat
What is the term given to the theory that states that the fertilized egg contains a complete miniature adult?
A) conjugation B) cell theory C) preformation D) transduction E) transformation
Genetic drift has an especially significant effect in what kind of populations?
A. populations that are large B. populations that are small C. populations with high genetic variability D. populations that are in Hardy-Weinberg equilibrium E. populations that are migrating