An example of artificial selection is the
A. fact that all mammalian limbs are made up of the same set of bones.
B. breeding of corn from teosinte.
C. observation that some snakes retain tiny, incomplete hind legs.
D. evolution of antibiotic-resistant bacteria.
Answer: B
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Describe some of the changes in weather conditions (winds, temperature, clouds, precipitation, pressure changes) you would expect to observe as a cold front approaches and passes through your location
Which of the following is true of the reaction: O2(g) ? 2 O(g)?
A) It is endothermic. B) It is exothermic. C) It is neither endothermic nor exothermic. D) None of these, the reaction cannot occur.
A USGS 1:24,000 scale quadrangle map has ________ points with known longitude and latitude values that can be used as control points for geometric transformation:
A. 8 B. 12 C. 4 D. 16
It took more than 100 years for the world’s population to double from 1 billion to 2 billion. How long did it take for the world’s population to increase from 4 billion to 5 billion?
a) Fewer than 15 years as the result of exponential growth b) Half the time of the first doubling, about 50 years c) More than 100 years; 1 billion people are added each 100 years d) The world’s population has not yet reached 5 billion