La esfera viviente donde los elementos que la componen interactúan y se mantienen en constante movimiento, se llama
A.
atmósfera
B.
biosfera
C.
corteza
D.
fosa abisal

In shallow water at the beach, manuel saw an animal whose body was protected by hard plates. its body also had radial symmetry. the animal pumped water into its tube feet to move. which invertebrate group does this animal belong to? a. mollusks b. echinoderms c. sponges d arthropods