Explain the respective advantages associated with operons being inducible (e.g., the lactose operon) or repressible
(e.g., the tryptophan operon). What will be an ideal response?
Inducible operons save energy for the prokaryotes because the proteins of the operon are only
synthesized when needed for survival.
The advantage of a repressible operons is that they prevent excess production of a metabolite
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In the figure above, this group of plants was given treatment V
a. 1 b. 2 c. 3 d. 4 e. 5
The _____ include the only winged invertebrates
a. cnidarians c. arthropods b. echinoderms d. placozoans
Sue was monitoring the oil spill into the Gulf of Mexico from an oil tanker. From her observations, she noted that the oil was moving as large patches in the water. It did not appear as though the oil was dissolving into the water. Why did the oil not dissolve into the water?
A. surface tension B. water has a high heat of vaporization C. hydrophobic interactions D. sea water acts as a solvent E. water forms hydration shells
Transient microbiota differ from normal microbiota in that transient microbiota
A) cause diseases. B) are found in a certain location on the host. C) are always acquired by direct contact. D) are present for a relatively short time. E) never cause disease.