The gut is lined with epithelial cells with ____________________ that connect the plasma membranes of adjacent
cells. Fill in the blank(s) with the appropriate word(s).
ANSWER: tight junctions
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Which of the following might explain the variation in this count from year to year?
a. annual weather conditions b. competition c. species diversity d. annual weather conditions and competition
The decline in an individual's fertility, with a corresponding decrease in the likelihood of survival, is known as ________
Fill in the blank(s) with correct word
Convergent evolution occurs when
A) unrelated organisms develop analogous structures. B) analogous structures evolve to be homologous. C) two or more different species evolve to become one species. D) two or more populations merge into one.
Complete the pathway for olfaction. Olfactory receptors -> _____ -> olfactory bulb -> olfactory tract -> olfactory cortex -> _____
a. CN I; limbic system. b. CN II; limbic system c. CN II; parietal lobe d. CN I; parietal lobe e. CN I; CN II