Answer:
Lysosomes
Explanation:
They break down excess or worn-out cell parts.
The answer I think is, some diseases the person might have.
Explanation:
body cells- intake the nutrients and specialized into to carry function.
tissues- have similar structure to function well in body like, connective tissue, muscle
organs- carry different identity of function in body like, heart(to pump blood) kidney( for filter and excrete wastes
Answer: option D. it acts as a reactant in a chemical reaction.
The substrate is the the chemical species in an organic reaction that reacts to form other product, so the substrate is a reactant. The enzymes can act over specific substrates to accelerate the reaction. While the enzymes are not consumed (they are catalysts) the substrates are consumed.
