The proteins necessary for the use of lactose in e. Coli are collectively called the

lac operon

Explanation:

The lac operon or lactose operon is found in E. coli which consist of genes that codes for proteins that are responsible for tranferring lactose into the cytosol and it further digested into glucose. The glucose further used for producing energy.

Hence, The correct answer is lac operon.

answer; i believe the answer is hydraulic action;

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !