Which of the following plants was used as a
bioremediator at the Aberdeen Proving
Grounds?
a. hemlock
b. poplar trees
c. maple trees
d. sawgrass
e. oak trees
B
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The number of different alleles for ABO blood types in the total human population is
a. 4. b. 6. c. 9. d. 2. e. 3.
How does the greenhouse effect work?
A) Rocks, soil, and water on Earth's surface absorb sunlight energy and radiate it as heat. B) Sunlight energy passes through the transparent water of the oceans and heats up the Earth's core. C) Some sunlight that hits Earth radiates toward space, but some is held by the atmosphere. D) All the sunlight energy striking Earth bounces off the planet and radiates into space.
Which of the following reactions is a dehydration reaction?
A. A + B + H2O ? C B. A + H2O ? B + C C. A ? B + C+ H2O D. A + B ? C + H2O
The condensation reaction that forms nucleic acid polymers occurs between a _____ group on one nucleotide and a _____ group on a second nucleotide.
A) nitrogenous base, nitrogenous base B) phosphate, hydroxyl C) carbon, carbon D) nitrogenous base, sugar