Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n) _________
A. theory.
B. data set.
C. hypothesis.
D. conclusion.
E. experiment.
C. hypothesis.
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During which meiotic phases does oogenesis arrest?
A. prophase I and metaphase II B. prophase I and prophase II C. metaphase I and prophase II D. metaphase I and metaphase II E. metaphase I and anaphase II
Which of the following terms is mismatched with its meaning or characteristics?
A. Diploblastic—ectoderm and mesoderm B. Triploblastic—ectoderm, mesoderm, and endoderm C. Parazoa—lacks symmetry; no tissues D. Eumetazoa—definite symmetry; tissues organized E. Chordate—animal with notochord
Source habitats are areas where reproductive success is less than local mortality. Indicate whether the statement is true or false
Which of the following statements regarding membrane function is false?
A) The plasma membrane forms a selective barrier around the cell. B) The plasma membrane plays a role in transferring signals to the cell's interior. C) The plasma membrane has receptors for chemical messages. D) The plasma membrane is the control center of the cell.