You toss a coin twice. Because the outcome of the first toss does not affect the outcome of the second toss, these 2 events are called
A. mutually exclusive.
B. independent.
C. dependent.
D. random.
B. independent.
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What role did cyanobacteria play in shaping Earth’s environment?
a. They are single-celled organisms that are detritivores. b. They produced oxygen, which led to changes in Earth’s atmosphere. c. They evolved into the first plants that colonized land. d. They are the ancestral form of all life on Earth
Predators can switch to alternative prey when a
prey species is low in abundance as is shown in a. type I response. b. type II response. c. type III response. d. types I and II. e. none of these.
Define the Oparin-Haldane hypothesis and explain how it has been tested in a laboratory
What will be an ideal response?
12C, 13C, and 14C are all isotopes of carbon. They differ in their
a. overall charges. b. number of electrons. c. number of protons. d. number of neutrons. e. electron energy shells.