Every species exhibits variations based on various genes being activated at various times. An example with humans can be eye color or hair color. What species means is that all members of a species can procreate with healthy, capable of procreating progeny, but anything else is just a variation.
Answer:D( Ribosomes
Explanation: Since most enzymes are proteins, it will be produced at the ribosomes. It may have an active and an inactive form. Which means another substance Will turn it on or off.
<span>When the molecules in a solid are heated (heat is the same as molecular movement) they move faster due to the energy gain and when they have enough energy they can overcome the attraction they have between each other and break their bonds to form a liquid, and if heated further a gas.</span>
