A close physical relationship between two different species that may or may not be beneficial is called ________.
Fill in the blank(s) with the appropriate word(s).
symbiosis
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The interaction of two or more polypeptide chains in a hemoglobin molecule is its ____ structure
a. primary b. secondary c. tertiary d. quaternary e. combined
An intrinsic factor of food that can determine whether spoilage occurs is
A) the degree of processing. B) the amount of preservatives added. C) the storage temperature. D) the water content. E) storage packaging.
Why is it important for signal transduction systems to trigger a rapid response within a cell and be able to be shut down quickly?
-All signal transduction cascades are shut down immediately so as to prevent the cell from mounting a response. -Cells are unable to respond quickly to hormones, and therefore signal transduction cascades always occur over a long time. -Cells have to be able to function alone, because they are unable to work together in a coordinated fashion. -Cells often have to respond very quickly to changes in their internal and external environments.
Identify and briefly explain the four premises of evolution by natural selection, as proposed by Charles
Darwin. What will be an ideal response?