Enzymes increase the rate of a given reaction by lowering what kind of energy?
a. combination
b. activation
c. thermal
d. electrical
e. solar
b
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When a cell makes a cell membrane bound growth factor that binds to receptors on neighboring cells causing them to proliferate this is an example of
A. autocrine signaling. B. endocrine signaling. C. paracrine signaling. D. contact-dependent signaling. E. direct intercellular signaling.
Based on this graph of vascular plant species on a volcanic island, at what point would you hypothesize that sea gulls began nesting on the island?
1.1998
2.1973
3.1965
4.1986
Formation of urine involves filtration, reabsorption and secretion, all of which are done by the bladder.
a. true b. false
________ degrades mRNAs that contain premature stops
Fill in the blank with correct word.