Nitrogen makes up about _________% of the Earth’s
atmosphere.
a. 20
b. 40
c. 60
d. 80
e. 90
Answer: d
Biology & Microbiology
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One application of the knowledge of sugar flow in xylem allows for the collecting of sap from maple trees in the:
A. summer B. winter C. fall D. early spring E. None of these is correct
Biology & Microbiology
In flowering plants how many egg cells are typically produced from each megaspore mother cell?
a. 1 b. 2 c. 3 d. 4 e. 8
Biology & Microbiology
How do viruses gain entry into cells?
What will be an ideal response?
Biology & Microbiology
Choose the letter of the best match from the following:A. Third trimester of pregnancyB. Second month of pregnancyC. First month of pregnancyD. Second trimester of pregnancyE. Third month of pregnancyNeurulation occurs.
What will be an ideal response?
Biology & Microbiology