Answer the following statements true (T) or false (F)
1. The electronegativity of an atom is a measure of its ability to attract electrons to its outer shell from another atom.
2. Table salt forms from sodium and chloride via hydrogen bonding.
3. Molecules are generally rigid structures and rarely change shape.
4. The presence of salt helps prevent oceans from freezing.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
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Which of the following is the stem cell needed to produce the male gamete?
a. Sperm b. Spermatogonium c. Primary spermatocyte d. Secondary spermatocyte
The above figure represents
a. membrane attack complex; pores in bacterial cell b. macrophage attack complex; fluids released from pores c. pores for mucus secretion ciliated lung tissue d. macrophages; muscle tissue e. none of these
Primary growth involves:a
an increase in length. b. an increase in girth. c. a production of secondary xylem. d. a production of cork cells. e. a division of vascular cambium cells.
During cellular reactions, electrons may be removed from compounds such as glucose and picked up by a coenzyme known as NAD+. When NAD+ gains these electrons, it is said to be
A. oxidized. B. synthesized. C. reduced. D. dehydrated.