Why do scientists say that evolution is a "theory"?
A) because it explains a great deal about life and is supported by an enormous body of evidence
B) because they are not very confident that it really happened
C) because it's really just a guess about how life developed on Earth
D) because it is supported by only a small amount of evidence
A) because it explains a great deal about life and is supported by an enormous body of evidence
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Oceans absorb much of the incident solar radiation
What will be an ideal response?
Which of the following is true of natural selection?
A) It is a random occurrence. B) It does not occur in most species of organisms. C) It is directed by changes in the environment. D) It does not lead to evolution of a species.
A convex-concave thin lens is made with the radius of curvature of the convex surface being 25.0 cm and the concave surface 45.0 cm. If the glass used has index of refraction 1.500, what is the focal length of this lens?
A) -32.0 cm B) 32.0 cm C) 113 cm D) 67.5 cm E) -113 cm
A stationary electric charge produces a magnetic field around it
a. True b. False Indicate whether the statement is true or false