D.) Both are circumstantial evidence....
Lively is your answer.
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Through phosphorylation, Cdks signal the cell that it is ready to pass into the next stage of the cell cycle. As their name suggests, Cyclin-Dependent Protein Kinases are dependent on cyclins, another class of regulatory proteins. Cyclins bind to Cdks, activating the Cdks to phosphorylate other molecules.
Answer:
Shape, Size, Height, Type of Food
Explanation:
The color is the variable and the type of hummingbird can't be controlled.
