Which type of junction contributes the most to the polarization of epithelial cells?
(a) adherens junctions
(b) desmosomes
(c) tight junctions
(d) gap junctions
(c)
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Red blood cells are formed at a rate of
a. 2?3 million per second. b. 2?3 million per minute. c. 2?3 million per hour. d. 10 million per day. e. 50 million per hour.
Which aquatic zone will provide a habitat for invertebrates and many small fish?
A. limnetic zone B. littoral zone C. epipelagic zone D. profundal zone
A swimmer sees a large blue jellyfish nearby. Jellyfishes are known to sting, so the swimmer moves away. The swimmer did which of the following?
A) Used inductive reasoning B) Used deductive reasoning C) Constructed a theory D) Tested a hypothesis
Choose the correct statement regarding estrous and menstrual cycles.
A. Ovulation only occurs in animals with a menstrual cycle. B. Copulation can only occur during ovulation in the menstrual cycle. C. Menstrual cycles are longer than estrous cycles. D. The lining of the uterus is shed during menstruation and estrous. E. Animals with estrous cycles are sexually receptive only when they are ovulating.