In an ecosystem, a population can be defined as
A.
all individuals of a species born in a specified month in every region of the world.
B.
all individuals of a species that exist or have existed in a given place.
C.
all the individuals of a species that exist together at a given place and time.
D.
all the individuals of every species at a given place and time.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey