Sponges are the simplest bilateral animal and do lack a body cavity. A sponge has two layers of tissue.
Answer:
it's 2
I don't know how to explain but yeah its 2
Answer:
Blood cells are produced in the bone marrow of the body more specifically they become blood cells from first being stem cells which then divide until they reach a mature red blood cell stage. ( or other types of cells, stem cells are like the blank template for either red blood cells, white blood cells, or platelettes.)
Explanation:
A representation of earths rounded surface on a flat surface is called___a map.