Zebrafish embryos change the color of the melanophore cells in their skin to a darker shade:
A. by dynein motor proteins moving pigment
granules outward from the center of the cell.
B. by kinesin motor proteins moving pigment
granules outward from the center of the cell.
C. by dynein motor proteins moving pigment
granules inward toward the center of the cell.
D. by kinesin motor proteins moving pigment
granules inward toward the center of the cell.
E. by dynein motor proteins moving pigment
granules inward toward the plus end of
microtubules.
B
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In the cell cycle, a mitotic Cdk is present during
A) G1. B) G2. C) M. D) S. E) all of the above
________ are various types of intracellular structures thought to have evolved within a cell rather than as organelles
a. Endosymbionts b. Ribosomes c. Lysosomes d. Mitochondria
The scientist who proposed that populations would outgrow its resources was ____
a. Malthus b. Crick c. Watson d. Darwin e. Smith
The normal biota of the central nervous system includes ________.
A. Neisseria meningitidis B. Herpes simplex I C. The CNS has no normal biota. D. Herpes simplex II E. Streptococcus agalactiae