It would be called an alloy.
The correct description of the role that enzymes play in biochemical reactions would be B. Enzymes bond with one or more reactants and lower the activation energy needed for the reaction.
Answer:
If the discs floated, they produced oxygen and gained buoyancy.
Answer: The growth of the plant decides on the presence of plant hormone, auxin which develops in the roots and shoots. Auxins change the rate of elongation in plant cells, controlling how long they become. So, if the tips are removed, there is no auxin made and growth of the plant stops.
