A close physical relationship between two different species that may or may not be beneficial is called ________.
Fill in the blank(s) with the appropriate word(s).
symbiosis
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How can poverty lead to overnutrition and obesity in America?
A. People living in poverty cannot afford foods with complete proteins. B. People living in poverty cannot afford foods with adequate amounts of vitamin A. C. People living in poverty may receive fewer than the minimum dietary requirement. D. People living in poverty take advantage of the growing availability of calorie-rich, highly processed foods. E. All of the above are correct.
You find a cell of a type you have never seen before. The cell has both a nucleus and a cell wall. Therefore, you conclude that it is likely to be a(n) ________ cell.
A) prokaryotic B) animal C) bacterial D) plant
The human cardiovascular system is comparable in some ways to a car's:
A) electrical system. B) cooling system. C) engine. D) transmission system.
The function of smooth endoplasmic reticulum is to ________ .
a. digest materials b. produce ATP c. make lipids d. ship proteins and lipids