For a population to persist, which needs to be true?
A) P = 0
B) P > 0
C) P < 0
D) P < C
B
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The main reason certain seeds germinate near the soil surface rather than deep in the soil is
A. they need additional oxygen. B. they are then more aware of their surroundings. C. they require light to germinate. D. they have water deprivation. E. they are sensitive to the cold temperatures of the soil.
The side group (R group) of the amino acid shown above contains which of the following functional
groups?
a. hydroxyl b. carbonyl c. carboxyl d. sulfhydryl e. amino
Referring to the illustration as a guide, if you were to put a stalk of celery into a mixture of water and food coloring, in which tissue would you expect to see the food coloring show later?
a. phloem
b. both xylem and phloem
c. xylem
d. none of these
How many nucleotides are required to code for 10 amino acids?
A. 30 B. 10 C. 20 D. 3