1. The answer is "<span>the energy required to start the reaction".
</span>This energy is called as activation energy of the reaction. If the activation
energy is high, reaction is slow. Enzymes help to carry out the reaction by
a new path by reducing the activation energy. But the energy of reactants
and the products remain as same as without enzyme.
2. The answer is "reaction in cells would be too slow to sustain life<span>".
</span>If the activation energy is very high for the reaction, then that reaction will
be very slow and will require more time<span> to complete the reaction. Then survival is
very low. Hence, the roll of enzymes is very important to sustain life.</span>
Autonomic nervous system (ANS) is the branch of the nervous system that provides unconscious control of basic body processes that is consists of two divisions; the sympathetic and parasympathetic. These two divisions have opposing effects on the internal organs they innervate. The Parasympathetic nervous system is the division that balances the actions of the sympathetic nervous system by slowing body processes, returning the body to homeostasis once a stressor has passed. The Sympathetic nervous system is the emergency system. Its major function is the fight-or-flight response in reaction to a threat. It speed-up key body processes to prepare the body for physical action.
D. Mutations will always impact an individual on some level
Most of these seem accurate or at least close to being accurate on how mutations affect genes however, some mutations won’t always impact an individual because some mutations are so minor. But this is my best guess
