Enzymes.
because enzymes are a substance produced by a living organism that acts as a catalyst to bring about specific biochemical reaction.
Answer: Some sticklebacks were stranded in lakes that were formed in the ice age
Sensory receptors is the answer I found
Answer;
C. it is the part f the atom with the greatest mass
Explanation;
The nucleus of an atom is a small dense region at the center of an atom that contains protons and neutrons.
Almost all the mass of an atom is located in the nucleus, with a very small contribution from the electron shells.
The protons are positively charged which gives the nucleus a positive charge while the neutrons have no charge.
