The initial event that triggers phagocytosis is when the ____
a. solute concentration is higher inside the cell than outside
b. solute concentrations is lower inside the cell than outside
c. target protein binds to the receptor
d. enzymes bind to the membrane
e. vesicles bud off from the membrane
ANSWER: c
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The dotted line in the figure above indicates ____
a. a polar covalent bond b. van der Waals forces c. an ionic bond d. a hydrogen bond e. a nonpolar covalent bond
In California, a species of salamanders were geographically separated over time. The group that lived in southern California relied heavily on large gold blotches on their skin that helped to camouflage them from predators. The group that lived along the coast adopted a color pattern that mimicked a poisonous, colorful newt common to that area. Instead of being camouflaged, these salamanders advertised their colors. What type of selection process has occurred over time?
A. artificial selection B. natural selection C. theoretical selection D. experimental selection
Choose the one most appropriate answer for each. Choices are used only once.
A. thyroid gland B. pancreatic islets C. gonad D. neurotransmitter E. anterior lobe of pituitary F. adrenal cortex G. pineal gland H. pituitary gland products involved in sex hormone production I. hormones J. parathyroid gland K. gonadotropin stimulating hormone L. adrenal medulla M. posterior lobe of pituitary
Which of the following contains all of the others?
A) biosphere B) community C) ecosystem D) population