The action of a white blood cell engulfing a
bacterium is
a. pinocytosis.
b. phagocytosis.
c. exocytosis.
d. endocytosis.
e. phagocytosis and endocytos
E
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During the mating season, male stickleback fish will respond to clay models with red bellies. The red belly
A. is a sign stimulus. B. results in an operant conditioning response. C. is a fixed action stimulus. D. is an innate releasing stimulus.
What evidence do we have that the orbits of the asteroids are modified by the gravitational influences of the planets?
What will be an ideal response?
How does gibberellin actually work?
A. In the presence of blue light, it triggers additional photosynthesis and growth. B. In the presence of light, it increases the turgor pressure of the cell and accelerates growth. C. In the presence of unidirectional light, it moves to the shady side and activates an ATP-driven proton pump that results in weakened cell walls and eventual elongation. D. In the presence of light, it increases the formation of additional DNA that codes for additional plant structures. E. It attaches to a plasma membrane receptor and results in gene activation to produce the enzyme amylase that releases sugars for additional cell growth, division, and elongation.
Free-floating, photosynthetic, unicellular protists include
A) phytoplankton. B) ciliates. C) cyanobacteria. D) amoebas. E) brown algae.