The best way to distinguish between sedimentary, metamorphic, or igneous rock is to
hit it with a hammer
examine it with a magnifying glass
poor acid on it
rub it against a streak plate

energy and particles

layer 3 is younger than layer 6.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.