In 2011, clinical medical trials using _____ to replace diseased cells in the eyes of blind patients showed some
success of restoring vision.
a. bone marrow cells
b. central disk cells
c. nervous tissue
d. embryonic stem cells
e. induced pluripotent stem cells
ANSWER: d
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The phenomenon in which one region of the body grows faster than another among different species is called...
A. paedomorphosis. B. Gremlin and BMP4 interaction. C. Hox gene translation. D. meroblastic cleavage. E. heterochrony.
If you skip a meal, ____
a. insulin levels will rise b. glucagon levels will rise c. glucose will be taken up by cells d. both insulin and glucagon levels will rise e. glucose will be converted to glycogen
What distinguishes facilitated diffusion from simple diffusion?
a. Molecules move from a region of lower concentration to a region of higher concentration. b. Membrane proteins help move molecules across the membrane. c. No energy is used to move molecules across the membrane. d. Molecules move from a region of higher concentration to a region of lower concentration.
Which structure protects pathogenic bacteria from phagocytosis?
a) Capsule b) Endospore c) Flagellum d) Axial filament