Proteins-proteases
Carbohydrates- amylase
Fats-bile
Answer: A
Explanation: the change in seasons is caused by Earths axis tilt and revolution and position near the sun
The things that birds have attached to their bodies called their wings, a left one and a right one, cause them to have the ability to fly.
Answer:
A human heart is roughly the size of a large fist.
Explanation:
but the size varies according to an individual's age, health and size. The heart weighs 7 to 15 ounces.
