ans is D. Most items are features in the spinal cord, but the hippocampus is in the brain.
O+ (O positive) if you have neither A nor B antigens but you have rhesus antigens.
Food chains model energy flow through an ecosystem. Producers pump energy into an ecosystem from an environmental source, and this energy is then passed from one organism to the next.
Pretty sure it would be the nerves attatched to the heart valve
A cell wall, cytoplasm and ribosomes
