Restriction enzymes are obtained from ________

A) archaea
B) eukaryotes
C) viruses
D) bacteria


D

Biology & Microbiology

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Nitrogen supplies to atoll coral reefs are thought to come from all except

a. nitrogen fixing bacteria. b. planktonic cyanobacteria wind-driven to the reefs. c. re-cycling by fish fecal material. d. runoff from land.

Biology & Microbiology

Which types of organisms are found at the base of a grazing food web?

a. decomposing organisms b. secondary consumers c. photosynthetic organisms d. predators

Biology & Microbiology

Which level of taxonomy encompasses all of

the others?

a. family b. class c. order d. species e. genus

Biology & Microbiology

Which structure allows green sulfur bacteria to grow using light energy under conditions of very low light?

a. thylakoids b. chloroplast c. chlorosome d. phycobilisomes

Biology & Microbiology