Donation for research is an important use of
A) extra embryos from ARTs.
B) embryos from failed IVFs.
C) the extra cells from preimplantation genetic diagnosis.
D) savior siblings.
A) extra embryos from ARTs.
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Which of the following, if used as a fertilizer, would be most immediately available for plant uptake?
A) NH3 B) N2 C) CN2H2 D) NO3- E) amino acids
The surface of the cells of some Pseudomonas species are covered in numerous threadlike structures. What is the likely reaction of such a Pseudomonas cell to the presence of a food particle?
A. Directional movement toward the food particle using a swimming motion B. Directional movement toward the food particle using a gliding motion C. Directional movement toward the food particle using an amoeboid motion D. No movement because the cell synthesizes its own food E. No movement because it is cemented in place
Some bacteria exhibit a primitive form of behavior in that they can sense the properties of their environments and use that ability to make adaptive responses. Which of the following are NOT capabilities of any known bacterium?
A. orientation with respect to the Earth's magnetic field B. move to other bacteria and aggregate with them in response to chemical signals C. respond to light with the aid of flotation devices D. respond to other individual bacteria and transmit DNA via conjugation E. none of the other options presented
Herbivores are unable to synthesize about half of the 20 ________ that are required to make proteins
Fill in the blank(s) with correct word