1pt Which organism gets energy from another organism? O A. an oak tree
O B. algae
O C. a mushroom
OD. a rabbit

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

20 the compound al(nh3)2 has atoms of nitrogen.

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material