Write a one-sentence explanation for the role of each of the following plant hormonelike signaling
molecules: methyl salicylate and jasmonic acid. What will be an ideal response?
Methyl salicylate triggers a signal transduction pathway that turns on the genes for the systemic
acquired resistance pathway, which in turn fights infection and promotes wound healing. Jasmonic
acid triggers the production of enzymes that confer increased resistance against herbivorous insects.
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What stimulates the production of adrenocorticotropic hormone (ACTH)?
A. GHRH B. CRH C. CIH D. ADH
Negative feedback systems are common in mammals because they act to maintain:
(a) homeostasis (b) body temperature (c) blood glucose levels (d) body fat
If a person's blood pressure is 120/70, the 70 refers to the pressure
A) during relaxation of the heart. B) during contraction of both ventricles. C) lowering between contractions. D) during contraction of the left ventricle only. E) during contraction of the vena cava.
The teacher was unaware of the difference between suspension feeding and predation. The teacher thought that providing live copepods (2 mm long) and feeder fish (2 cm long) would satisfy the dietary needs of all of the organisms
Consequently, which two organisms would have been among the first to starve to death (assuming they lack photosynthetic endosymbionts)? A) sponges and corals B) sea stars and sponges C) shrimp and bivalves D) bivalves and sponges