According to the __________, the universe formed about 13 to 15 billion years ago and is still expanding. Fill in the blank(s) with the appropriate word(s)
ANSWER: big bang theory
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The transformation of humans from hunter-gatherer societies to agriculturally based ones occurred approximately
____.
a. 14,000 years ago b. 11,000 years ago c. 7,000 years ago d. 1,500 years ago e. 200 years ago
Larger cells tend to
a. be long. b. be thin. c. have frilly surfaces. d. have folds that increase surface area. e. have any of these attributes.
The observation that although fresh water habitats account for only 1% of the Earth's water, they are home to 36% of the known species of fish is due to _______ speciation.
A. prezygotic B. postzygotic C. allopatric D. sympatric E. outgroup
Based on these results from the Bacterial Examination of Food exercise, what can you conclude about the bacteria present in the food sample? (Choose all that apply)
> They cannot ferment lactose > They are strong lactose fermenters > They are not coliforms > They are facultative anaerobes > They are Gram-negative > They are obligate anaerobes > They are Gram-positive > They are coliforms