Why have more groups within the archaeplastids not developed complex multicellularity?
What will be an ideal response?
Answer: Evolution is not goal-oriented, resulting in complex multicellularity; each group is successful with its current morphology.
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The streamlined bodies seen in sharks, tuna, and dolphins best relate to
A. a recent shared common ancestor. B. dissimilar selection pressures. C. the physical properties of water. D. the need to escape fast-moving predators. E. intelligent design.
During the early part of the cleavage stage in frog development, the rapidly developing cells
A) skip the mitosis phase of the cell cycle. B) skip the S phase of the cell cycle. C) skip the G1 and G2 phases of the cell cycle. D) rapidly increase the volume and mass of the embryo. E) skip the cytokinesis phase of the cell cycle.
What type of electric charge do protons carry?
What will be an ideal response?
Importing high concentrations of compatible solutes is a strategy cells use to counteract the effects of an environment containing a
a. high salt concentration. b. high dissolved-oxygen concentration. c. high water potential. d. low ionic concentration.