Which ion plays the most prominent role in the opening and closing of stomata?
a. Cl-
b. K+
c. Na+
d. Ca2+
Ans: b. K+
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In many species, there are two representatives of each chromosome. In such species, the characteristic number of chromosomes is called the ________ number. It is usually symbolized as ________
A) haploid; n B) diploid; n C) diploid; 2n D) haploid; 2n E) None of the answers listed is correct.
Ovulation occurs
A) during the middle of the proliferative phase of the menstrual cycle. B) at dawn on each day following FHS and LH release by the pituitary gland. C) during the secretory stage of the menstrual cycle. D) at the beginning of menses. E) after the formation of the corpus luteum.
Each of the following is a component of focal adhesions except
A) integrin. B) talin. C) ?-actinin. D) vinculin. E) plakoglobin.
________ are the fundamental units that make up all living things.
A. Cells B. Coelom C. Cristae D. Compartments E. Chromosomes