A defect in transport of which ion would have the most direct effect on muscle contraction?
a. Cl?
b. K+
c. Ca2+
d. Na+
e. Zn2+
C
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Which groups of microorganisms are most likely to be found on the skin?
a. Bacteria, yeast and protozoa b. Protozoa, bacteria and fungi c. Yeast, fungi and plant spores d. Fungi, bacteria, and yeast e. Protozoa, yeast and fungi
This hormone binds to a plasma membrane
receptor and has its effect by way of a second messenger. This hormone is
a. aldosterone. b. calcitonin. c. progesterone. d. cortisol. e. more than one of these
Molecular/structural orientations (gradients) in an egg are thought to play a significant role in development. What is the origin of such gradients? What evidence indicates that the maternal genotype is involved in providing such gradients?
What will be an ideal response?
Spiders are ________
A) herbivores B) filter feeders C) carnivores D) omnivores