Which best describes derived characteristics? They are newly evolved traits.
They appear in all the ancestors.
They appear at the end of each branch.
They stem from primary characteristics.

Which element provides strength to the exoskeleton of clams and oysters

The shift of a vehicle's weight around its center of gravity is known as

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.