In ____, one group of cells causes or influences another nearby group of cells to follow a particular developmental
pathway.
a. apoptosis
b. induction
c. differentiation
d. determination
e. cleavage
ANSWER: b
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When bound to ligand, this type of receptor changes conformation to allow ions to move down their concentration gradient across the membrane:
A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor
Four of the five structures listed below are parts of
the same sense organ. Select the exception. a. ommatidium b. retina c. crystalline cone d. photoreceptor e. lens
What are the key replication enzymes at the replisome, and how is DNA replication on both leading and lagging strands made efficient through the conformation of the DNA at the replisome in prokaryotes?
What will be an ideal response?
In some ciliate protozoa, the codons UAA and UAG encode glutamate, rather than acting as STOP codons. How does this compare to other species?
A. This is unusual - almost all species share the same "universal" genetic code. B. This is not unusual - while most species have a similar genetic code, there are often variations for some of the amino acids. C. This is typical - every species has its own unique genetic code.