Thechemically changes food molecules into energy. Nucleus

Chloroplast

Mitochondria

Cell Membrane

(This is 7th grade science).

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Select the correct answer from each drop-down menu. the lac operon in e. coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .