Which statement correctly distinguishes photosynthesis and respiration? Photosynthesis occurs in animal cells and not plant cells. Cellular respiration occurs in animal cells and not plant cells. Photosynthesis uses chemical energy as energy source, and cell respiration uses light energy. Photosynthesis uses light as energy source, and cell respiration uses chemical energy.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

i think its the first one

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.