Neural crest cell originates from dorsal part of (i)________________. It migrates by undergoing (ii)________________ , followed by differentiation.
a) (i) neural plate, (ii) Epithelial-Mesenchymal Transition
b) (i) neural tube, (ii) Epithelial-Mesenchymal Transition
c) (i) neural plate, (ii) Mesenchymal-Epithelial Transition
d) (i) neural tube, (ii) Mesenchymal-Epithelial Transition
Answer: b) (i) neural tube, (ii) Epithelial-Mesenchymal Transition
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Weight loss dieting in humans has been shown to ____
a. increase absolute numbers of Firmicutes bacteria b. decrease absolute numbers of Firmicutes bacteria c. increase the abundance of Firmicutes bacteria relative to Bacteroidetes bacteria d. decrease the relative abundance of Firmicutes bacteria relative to Bacteroidetes bacteria e. not affect bacterial populations in human intestines
Two species of closely related squirrels both
feed on acorns produced by oak trees. One species feed exclusively near the top of the tree and the other feeds exclusively towards the bottom of the tree. This is an example of
a. competitive exclusion. b. resource partitioning. c. mutualism. d. commensalism. e. mimicry.
The _______ nerve carries signals from the retina to the visual cortex of the cerebrum.
Fill in the blank(s) with correct word
Identify the labeled structures in the picture of the human ear. 
A:________B:________C:________D:________E:________F:________G:________H:________I:________J:________K:________L:________M:________
What will be an ideal response?