Chemicals were first used to kill or ward off pests
A. about 70 years ago.
B. since the beginning of modern chemistry several hundred years ago.
C. during World War II.
D. thousands of years ago.
Answer: D
You might also like to view...
Virtual water refers to water
A) consumed in the production of other products, for example beef, cars or newspaper. B) shipped around the world to arid areas. C) mined from ground water aquifers that are no longer being recharged. D) extracted from bio- and sewage waste.
Which of the following statements about water is true?
A) At temperatures above 4°C, warmer water will rise. B) At temperatures above 4°C, warmer water will sink. C) At temperatures between 0°C and 4°C, warmer water will rise. D) At temperatures below 0°C, warmer water will sink.
Although loess forms in only a few environments, it covers approximately ____________________%
of Earth's land surface. Fill in the blank(s) with the appropriate word(s).
In which type of inhibition does the inhibitor bind to the active site?
A) cooperative inhibition B) competitive inhibition C) noncompetitive inhibition D) selective inhibition