Which of the following is one way in which scientists can test hypotheses about events that occurred in the distant past?
A) by dissecting current animal specimens
B) by analyzing fossils recovered from the Earth
C) by visiting local libraries to research the events
D) by interviewing current scientists and researchers
B
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Which of the following is an organic
molecule?
a. carbon dioxide (CO2) b. water (H2O) c. methane (CH4) d. hydrochloric acid (HCl) e. more than one of these is an organic molecule
What are the downsides of sweat as a cooling mechanism? What will be an ideal response?
Which of the following statements is NOT TRUE
concerning photosynthetic plants? a. They get carbon from the environment. b. They obtain energy from the environment. c. They make their own food. d. They provide food for others. e. They require no more than energy and a carbon source to make their food.
For an Rh incompatibility to occur during pregnancy,
the mother must be a. positive and the father negative. b. negative and the father negative. c. negative and the fetus positive. d. negative and the father positive. e. positive and the fetus negative.