A biochemical synthesized in small quantities in one part of an organism and transported to another, where a target cell is affected is a(n)
A. spore.
B. scion.
C. enzyme.
D. callus.
E. hormone.
E. hormone.
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Scientist believe that the formation of organic polymers, like RNA and DNA, had to move from the watery environment of the seas to solid surfaces or evaporating tidal pools because
A. dehydration is necessary for the formation of large organic polymers, too much water competes with dehydration. B. hydrolysis is necessary for the formation of large organic polymers, dehydration competes with polymerization. C. tidal pools would provide a concentrated area where more small organic molecules could aggregate. D. Kusky discovered 1.43 billion year old fossils in shallow water and tidal pools. E. sugars dissolve in water, ribose is a sugar and is necessary for the polymerization of DNA and RNA therefore being out of the water would speed up the polymerization reactions.
Biofilms ____
a. are formed by prokaryotes living in a watery environment b. may develop on surgical implants c. are exemplified by dental plaque
d. are formed by prokaryotes living in a watery environment and may develop on surgical implants e. are formed by prokaryotes living in a watery environment, may develop on surgical implants, and are exemplified by dental plaque
what are three antibiotics used to inhibit cell wall synthesis
What will be an ideal response?
Which of these transposable elements do not carry genes for functions other than those needed for transposition?
A. Retrotransposons B. Conjugal transposons C. Composite transposons D. Insertion sequences