The photo shows a porcupine with its quills raised. How does this behavior affect the survival of the porcupine population?
A. It helps a porcupine defend itself from a predator.
B. It tells other porcupines this porcupine wants to cooperate.
C. It increases a porcupine's chances of surviving cold winters.
D. It increases a porcupine's chances of finding a mate.

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What is involved in redox reactions

Adoença vitiligo afeta qual doença do corpo?

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.