Explain why critics did not readily accept the Darwin-Wallace theory of natural selection. What will be an ideal response?
Although Darwin and Wallace presented a well thought-out idea with good observational
support, critics noted that any less-than-perfect structure would be useless. Critics presupposed
that existing structures were always used exactly as they are now, which is not necessarily true.
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The fact that a red-flowered snapdragon bred to a white-flowered snapdragon produces pink-flowered offspring is an example of
A) codominance. B) pleiotropy. C) incomplete dominance. D) blending inheritance.
What is a closed system, and why is it necessary for a rock or mineral being dated to be a closed
system? What is the result if it is not a closed system? What will be an ideal response?
All of the following affect the thickness of the soil that develops on a site EXCEPT
A. the slope of the land. B. rate of decomposition of organic matter. C. rainfall. D. the parent material.
A rock consists of small but well-formed, randomly oriented, intergrown silicate-mineral crystals. Which type of rock is it: igneous, metamorphic, or sedimentary?
What will be an ideal response?