B . Excessive commercial fishing
Reason: the other options are good things this is the only bad thing
Answer:
(1) they keep toxic substances out of the cell.
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles
The final phase the 5th phase I think
The first statement is absolutely correct !!
in a neutral atom, no of protons are always equal to no of electrons !!
I think it would be 34.4 ml
