The symbiotic relationship between a flower and the insect that feeds on it's nectar is an example of?

What is used to keep track of the gamates and possible offsprings combination

What element is able to combine with itself and hydrogen to form large molecules ?

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping