One of the reasons biodiversity is such an important aspect of sustainability is the fact that
a. cycling chemicals maintains a ready supply of new materials for water, soil and food
b. it is the ultimate source of energy for plants
c. interactions among species provide population controls that limits ultimate population sizes of many species
d. it provides water purification and topsoil renewable
e. two of these answers are correct
E
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The Sylvania Super Saver 75-W light uses 20 W, produces 1,280 lumens, and costs $4.49. As an alternative, a generic 75-W incandescent light bulb costs $0.40 and produces 1,200 lumens.
a. Compare the performance of each light by calculating the efficacy for each light. b. Estimate how much it would cost to run each light for 4 h per day for 300 days in a year. Assume electricity costs 9 cents per kWh.
Neanderthals differ from humans in that ____
a. Neanderthals were not humans b. Neanderthals did not have sophisticated tools c. Neanderthals preferred a nomadic lifestyle d. Neanderthals had larger brains e. Neanderthals had smaller brains
Most grasslands in North America have been heavily influenced by:
A. Agriculture and the grazing of domesticated animals. B. Oil and gas development. C. Development of shopping malls. D. Urban development.
How many molecules of ATP are produced for each molecule of O2 consumed during oxidative phosphorylation?
A) 2 B) 4 C) 6 D) 8