When conditions do not favor growth of Chlamydomonas, ________ are formed
a. haploid (+) and (-) cells
b. diploid immobile spores
c. haploid flagellated spores
d. zygotes
d
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Why does blood flow through capillaries at a much slower rate than through the aorta?
a. Capillaries are much narrower than the aorta and provide much more friction which reduces flow to nearly zero. b. Blood flow through capillaries is reduced dramatically due to the effect of gravity on individual red blood cells. c. The combined diameter of all capillaries is larger than the aorta, which results in a commensurate reduction in flow velocity. d. Blood flowing through capillaries is deoxygenated, providing less energy for precapillary sphincters to pump blood.
In humans, how many layers of cells are formed during gastrulation?
a. One b. Two c. Three d. None
Serotonin-produced satiety was found to have three major properties, what are they?
What will be an ideal response?
Explain the four features necessary to classify an organism as a vertebrate.
What will be an ideal response?