Peristalsis is the _____
A) movement of the muscular layer surrounding the alimentary canal that is under voluntary control
B) rhythmic waves of contraction of the muscular layer surrounding the alimentary canal that are responsible for moving contents of the lumen along the length of the digestive tract
C) movement of nerve impulses from the central nervous system to the autorhythmic smooth muscle cells
D) rhythmic lengthening and shortening of epithelial cells lining the lumen of the alimentary canal
Answer: B
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What becomes more likely to occur in a small population? Check all that apply.
_____ the Allee effect _____ increased genetic drift _____ increased genetic diversity _____ extinction vortex _____ increased edge effect Additional: Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about population size? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
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The sun shining on a tidal pool during a hot day heats the water. As some water evaporates, the pool becomes saltier, causing _____
A) an increase in its carbon dioxide content B) a decrease in its oxygen content C) an increase in its ability to sustain aerobic organisms D) a decrease in the water's density
Which of the following statements is false?
A) Females are born with more primary follicles than they have at puberty. B) The pH of the vagina is acidic to deter microbial growth. C) In oogenesis, meiosis is completed only if fertilization occurs. D) Females enter menopause when their follicles become overly responsive to LH and FSH.