An ion is an atom or group of atoms that has
A. a different number of neutrons than most atoms of that element.?
B. lost or gained a proton.?
C. lost or gained an electron.?
D. a biological half-life due to radioactive decay.
C
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The _______ is responsible for forming the outer, limiting barrier of a cell
A. peroxisome B. ribosome C. mitochondrion D. plasma membrane E. centrosome
Which of the following is true regarding the difference between the mucosa of the small and large intestines?
A. They both have villi, but only the small intestine has microvilli. B. The small intestine has deeper intestinal crypts than the large intestine. C. The small intestine has simple columnar epithelium and the large intestine does not. D. Intestinal crypts are only found in the large intestine. E. The large intestine has larger circular folds than the small intestine.
What happens when the radial muscle of the eye contracts or shortens? a. The size of the pupil decreases. b. The size of the pupil increases
c. The lens becomes more concave. d. The lens becomes more convex. e. The iris reflects less light.
Using directional terminology, one would say that the shin is ________ relative to the knee.
Fill in the blank(s) with the appropriate word(s).