How could Mendel determine if 2 of his pea plants were true-breeding or hybrid? Use a Punnett square, along with a 1-2 sentence explanation to answer the question.

Ascientific idea becomes valid when it is what?

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?

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