Which of the following was historically considered to be the biggest limiting factor in worldwide food production up until the last century?
A) carbon B) land C) seed availability D) nitrogen
Answer: D
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Which of the following animals would have access to the most oxygen in its environment?
a. a termite living in its underground nest b. a snow leopard living high in the Himalayan mountains c. a zebra living close to sea level d. a deep-sea ray
__________ are cells that synthesize bone, whereas __________ break bone down. Fill in the blank(s) with the appropriate word(s)
How many years did it take for the world population to reach one billion?
a. 100,000 b. 500,00 c. 1 million d. 2 million e. 2.5 million
In a healthy person, after a large meal, the production of _____ will increase. After fasting, the production of _____ will increase
A) trypsin; trypsinogen B) glucagon; glucose C) glucagon; pepsinogen D) insulin; glucagon