The double-layered membrane that covers the lungs is the ____
a. periosteum
b. pericardial membrane
c. peritoneal membrane
d. pleural membrane
e. intercostal membrane
ANSWER: d
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________ is an alternative method of research to experimentation based on ________
a. Observational research; no hypothesis b. Perspective-based research; no hypothesis c. Perspective-based research; personal perspectives d. Observational research; frequently observed behaviors
Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500, and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight, rabbit: 100 calories, hawk: 300). How many clover plants, per day, does it take to support a family of hawks (Mom, dad, and juvenile. Assume each hawk needs the same number of calories per day.)?
A. approximately 1800 clover plants B. approximately 18,000 clover plants C. approximately 100 clover plants D. approximately 600 clover plants E. None, hawks do not eat clover plants.
Alzheimer's disease often affects cholinergic neurons
a. true b. false
The primary function of molecular membranes is the transport of ions and molecules in and out of cells. The movement of molecules from areas of low concentration to those of high concentration against chemical gradients is best described as:
A) passive transport. B) osmosis. C) active transport. D) channel-mediated diffusion. E) electron transport.