No new settlers arrive, and nobody leaves the island. After a few generations, the percentage of blue-eyed individuals increases from the original zero to 25 percent. This is probably due to which of the following factors?
A) genetic drift B) gene flow C) mutation
Answer: A
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Explain how light energy is transformed into chemical energy in the light-dependent reactions and describe where the energy is stored at the end of the light-independent reactions
What will be an ideal response?
A species of archaea, Ferroplasma acidarmanus, lives in water and has a pH of zero, yet are able to maintain their internal pH at a cozy 5 despite living in an environment with a composition essentially the same as hot battery acid. These data showing the pH profiles of four enzymes isolated from F. acidarmanus indicate that optimal enzyme function occurs at
1.around pH 5, which is consistent with the organism’s internal environment.
2.around 0, which is consistent with the external environment.
3.an average of around pH 2.5.
4.a fairly basic pH.
One key to Mendel's success was choosing to observe ________ traits, which exhibit one of two possible phenotypes
Fill in the blank(s) with correct word
Activated B lymphocytes that secrete antibodies are called ________.
A. T lymphocytes B. plasma cells C. macrophages D. monocytes