Answer:
A.) Core
Explanation:
Core definition: a central and often foundational part usually distinct from the enveloping part by a difference in nature.
Pavlov's dog stopped salivating to the bell when the food was no longer paired with the bell. This is called:
extinction
It is also possible to move substances across membranes against their concentration gradient (from areas of low concentration to areas of high concentration). ... If the energy of ATP is directly used to pump molecules against their concentration gradient, the transport is called primary active transport.
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Alternative RNA splicing determines which proteins are produced from each gene.
Poor fitness can cause your heart to start disfunctioning, and not beating the way it should be. If an adult is not exercising often, they can end up having major heart problems that can affect the way they see their future.
