Atmospheric oxygen DID increase after the evolution of photosynthetic prokaryotes. So It is true.
Answer:
Yellow bone marrow can be found in the long bones of the human body one such bone being the femur the yellow bone marrow contains certain stem cells which produce cartilage, fat and bone.
Explanation:
Answer:
3 valence electrons
Explanation:
Aluminum has three valence electrons. Valence electrons are found in the outermost shell of an element and are responsible for its valence.
A wooden spoon insulates itself and retains no heat, a mental spoon would retain heat, and probably burn your hand<span />
