Explain how natural selection has played an essential role in driving the modifications that have lead to the incredible biodiversity of life on Earth
What will be an ideal response?
ANS:
Will vary, but should include: mention of some of the components of natural selection, adaptation, environ-mental fit, and perhaps mention of the evolution of complex traits.
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If a single-celled freshwater organism such as a protistan is transferred to saltwater, which of the following is likely to
happen?
a. The cell will burst. b. The cell will shrink. c. Salt will be pumped out of the cell. d. Salt will be pumped into the cell. e. Enzymes will flow out of the cell.
Which of the following is most accurate regarding cells?
1.All cells have a nucleus. 2.All cells divide by meiosis. 3.All living organisms are made up of one or more cells. 4.Cells arise through spontaneous generation. 5.Growth is solely the result of cell division.
Oats are eaten by humans as oatmeal or rolled oats, and as feed for livestock such as cattle. In order for an oat plant to make the part we eat (the seed), it must flower and be pollinated. Typically, oat plants flower when days are lengthening (i.e., late spring to early summer). What is the best classification for oat plants?
A) long night B) short night C) night neutral D) short day
Which of the following is a male part of the angiosperm flower?
A. Sepal B. Stigma C. Anther D. Corolla