Answer:
this process is called METAMORPHOSIS.
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The answer is D because the electrolytic cell needs energy to run because the reaction between half-cells are not spontaneous.
Answer:
There are two types of variables that can lower internal validity: extraneous variables, which are any factors that are in the experiment but not being studied, and confounding variables, which are related to the independent variable and affect the dependent variable.
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution.