Which ecosystem covers a large percentage of Earth’s surface and, despite having low productivity, contributes a high
percentage of total net primary productivity?
a. open ocean
b. extreme desert, rock, sand, ice
c. desert and thornwoods
d. tropical deciduous forest
e. temperate rainforest
ANSWER: a
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If a woman of blood type A has a child of blood type
O, the father may belong to a. blood type A, AB, or O, but not B. b. blood type O only. c. blood type A or B only. d. blood type A, B, or O, but not AB. e. any blood type other than A.
Identification of bacteria in the laboratory usually begins with the ________ for placement in one of two large groups of bacteria
A) Koch's stain B) Gram stain C) Pasteur fermentation test D) Petri stain E) Ehrlich magic test
What is misleading about commercials that show "scientific proof" that laundry detergent X is better than another leading brand?
A. We do not know if everything besides the detergents was the same (machine used, type of stains, etc.). B. We are shown only one tee-shirt becoming whiter in each detergent, not 20 tee-shirts in each detergent. C. We do not know whether the same amount of each detergent was used for washing. D. All of the above are aspects that are misleading.
To date, there are not any indications that transposable elements offer a selective advantage to a species
Indicate whether the statement is true or false