The term that refers to two hormones working together at a target tissue is ____
a. opposition
b. permissive interaction
c. priming interaction
d. synergistic interaction
e. commensal interaction
ANSWER: d
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In the oceans, sulfur exists primarily as ________, and in rocks and sediments sulfur occurs mostly as ________ and ________
A) hydrogen sulfide (H2S) / gypsum (CaSO4) / elemental sulfur (So) B) hydrogen sulfide (H2S) / sulfate (SO42-) / elemental sulfur (So) C) sulfate (SO42-) / gypsum (CaSO4) / pyrite (FeS2) D) sulfate (SO42-) / sulfide (H2S) / elemental sulfur (So)
Why are leaves usually so thin? When might you see thicker leaves?
What will be an ideal response?
At the arteriole end of the capillary, more fluid leaves
the capillary than enters as a result of a. osmotic pressure. b. hydrostatic pressure c. gap junctions. d. vasodilation. e. all of these.
In bacteriophage T4, all rIIA mutants are found to complement all rIIB mutants. However, rIIA mutants fail to complement other rIIA mutants, and rIIB mutants fail to complement other rIIB mutants
Furthermore, mutants with deletions that span both rIIA and rIIB complementation groups do not complement either A or B mutants. What do these data mean, and what do the complementation groups represent?