Why are producers found at the start of every food chain?
A. Producers capture energy from the sun and
can make food, so they don't need other
organisms.
B. Producers are mobile like other organisms on
higher levels.
C. Producers are the smallest organisms of any
of other organism.

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

the denominator has a very specific role.

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.