When we compare animal development to plant development, we find that _____
A) plant cells, but not animal cells, migrate during morphogenesis
B) animal cells, but not plant cells, migrate during morphogenesis
C) plant cells and animal cells migrate extensively during morphogenesis
D) neither plant cells nor animal cells migrate during morphogenesis
B
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Eukaryotes have at least three main mechanismsfor regulating translation. Which of the following is not one of those mechanisms?
A. Initiation factorsare subject to phosphorylation by protein kinases. B. Some proteins bind directly to mRNA and act as translationalrepressors. C. Intron-containing transcripts are targeted for export out of the nucleus by splicing factors. D. Binding proteins can disruptthe interaction between eIF4E and eIF4G.
Sebum contains
a. fats b. waxes c. glycerides d. all of these plus lysozyme e. all of these except lysozyme
Germ cells are ____
a. found in the zygote b. destined to become gametes c. programmed to become the placenta d. found within the egg prior to fertilization e. larger in size than the original egg
When contracted, ________ prevents movement of chyme from the stomach to the small intestine
A) peristalsis
B) reverse peristalsis
C) the epiglottis
D) a sphincter