What happens to the total biomass available as you move up a food chain? Does it increase, decrease or stay the same?
A) decrease.
B) increase.
C) not change.
D) none of the above.
Ans: A) decrease.
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The restriction-modification system always has two genes involved, the cutting enzyme and the methylating enzyme
Indicate whether this statement is true or false.
According to the __________, the universe formed about 13 to 15 billion years ago and is still expanding. Fill in the blank(s) with the appropriate word(s)
Wilderness proponents emphasize that ninety-six percent of the United States is open to development; the remaining four percent consists mainly of areas developers
A. could not enter because of legal restrictions. B. felt was too beautiful to ruin. C. agreed was culturally important. D. could not reach or did not want. E. agreed was important for ecological services.
Which is NOT an indigenous microbe used for bioremediation?
A) Piscirikettsis salmonis B) Pseudomonas aeruginosa C) Phanerochaete sordida D) E. coli E) Deinococcus radiodurans