sodium helps to regulate pH and _______ balance in the body
Fill in the blank(s) with the appropriate word(s).
water
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Which one of the following is a major difference between plants and animals?
A. Animals use sophisticated genetic programs to govern their development and day-to-day functions. Plants do not. B. Plant cells have evolved modifications of the plasma membrane that permit the transfer of information and molecules from one cell to another. Animal cells have not. C. Plants have a meshwork of extracellular molecules that provide structural support and that determine the shape of the cells. Animals do not. D. Animal cells are able to absorb large molecules across their plasma membrane. Plant cells are not.
Echinoderms achieve locomotion by using their water vascular system
a. True b. False
When Terry Irwin collected beetles from a tree to catalog the species, he found that ____ of the individual beetles he
collected belonged to species not yet described.
a. less than 10% b. 25% c. 50% d. 75% e. more than 90%
_____ muscle tissue has a striated appearance and is under voluntary control
a. Skeletal c. Cardiac b. Smooth d. Skeletal and cardiac