The femur in a snake and pelvis in a whale are examples of structures.
A. analogous
B. homeotic
C. vestigial
D. heterologous
E. homologous
C. vestigial
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Food being digested in the stomach is in a highly acidic environment. When the food is released from the stomach into the small intestine, why is the environment no longer acidic?
A) Secretin increases the flow of bicarbonate ions from the pancreas into the small intestine to neutralize the stomach acid. B) Enterokinase activates trypsinogen, thus neutralizing the stomach acid. C) Bile salts from the gallbladder neutralize the stomach acid. D) When pepsinogen activates pepsin, one result is the neutralization of stomach acid in the stomach.
Of these membrane transport processes, which do/does not make use of a vesicle?
A. phagocytosis B. osmosis C. pinocytosis D. neither osmosis nor facilitated diffusion E. facilitated diffusion
Young multicelled organisms usually start out small, then grow in size and increase in complexity. This process is called
a. reproduction. b. heredity. c. development. d. evolution. e. metabolism.
Vital capacity is always equal to
a. tidal volume. b. inspiratory reserve volume. c. expiratory reserve volume. d. a + b + c.