Why can't we use modern atmospheric conditions to infer the origin of life?
What will be an ideal response?
ANS:
Earth was very different when life began, thus chemical reactions would have proceeded in a different manner producing different organic molecular. Using present atmospheric conditions would therefore not be informa-tive.
You might also like to view...
If the ? of surrounding soil is higher than that in living root epidermal cells, then water should
a. leave the root cells, making them flaccid. b. enter the root cells, making them turgid. c. leave the root cells, making them turgid. d. enter the root cells, making them flaccid. e. none of these accurately describe water movement.
Which digestive structure in humans is active in both the digestion of food and the absorption of
nutrients?
a. mouth b. liver c. pancreas d. small intestine e. stomach
Besides the obvious fact that chemical mutagens are dangerous to handle, another major disadvantage to their use is that __________
A) most of these mutations are immediately lethal B) most chemically induced changes are detectable only by sequencing C) chemical mutagens activate transposons D) two or more generations of further matings are required to isolate them E) they alter all A-T and C-G base pairing
This kind of mutation causes the wrong amino acid to be used in making a protein.
A. missense B. nonsense C. point D. silent