How many years did it take for the population to go from 1 billion to 7 billion?

a. 100
b. 200
c. 1,000


d. 10,000
e. 1,000,000


ANSWER: b

Biology & Microbiology

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Synovial membranes are found in

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What do the DNA sequences found at the origins of replication signify?

What will be an ideal response?

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Respiration is called aerobic because ________

A) it happens in the absence of oxygen B) it requires oxygen C) it requires carbon dioxide D) it happens in mitochondria

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