Use hypothesis, controlled experiments and variable in the same sentence

john wanted to do a controlled experiment to prove a classic theory, he had a hypothesis in which the bacteria would grow based on how hot was the petri dish that they were living in was. to limit the amount of variable he used the same sample of bacteria and the same petri dish for each trial.

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%