All organisms need instructions to specify their traits. the instructions, or code, that is responsible for all the inherited traits of an organism
is held in genetic material called dna.
is formed after an organism is fully-grown.
is passed from the offspring to the parent.
is stored within the mitochondria of cells.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products