Which type of involuntary muscle is found only in the heart? A.
smooth muscle
B.
cardiac muscle
C.
skeletal muscle
D.
stomach muscle

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

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