Which important discovery in the early 1900s enhanced food production, thus increasing human population growth?
a. cultivation of rice
b. cultivation of wheat
c. the wheel
d. synthetic fertilizer
e. penicillin
ANSWER: d
You might also like to view...
Which of the following is typically FALSE for tropical rainforests?
a. Tropical rainforests are biologically diverse ecosystems. b. Tropical rainforest soils have high acidity. c. Minerals such as calcium and phosphorus are subject to leaching from the upper tropical rainforest soil level. d. Tropical rainforest soils are extremely rich in nutrients. e. Organic remains are decomposed rapidly in tropical rainforests.
An antibiotic kills 99.9% of a bacterial population. You would expect the next generation of bacteria to
A) be just as susceptible to that antibiotic as was the previous generation. B) be more resistant to that antibiotic. C) die out due to the drastic decrease in population size. D) be more contagious than the prior generation.
In what manner does predation reduce competition?
What will be an ideal response?
A gene has been discovered in a eukaryote that is identical to a gene of a bacterium that the eukaryote normally engulfs and digests. This is probably due to
A. horizontal evolution. B. vertical evolution. C. convergent evolution. D. horizontal gene transfer.