Answer:
An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus.
Explanation:
i think it is D) stays the same, decreases. because it sound right to me.
Archaea do still exist but only in extreme environments. Pointing to this is the fact that they were undiscovered for a while until they were eventually found in aquatic environments with extremely high temperatures.
Answer:
C.
Coal is made from fossilized remains of ancient plants and animals. When coal is mined/burned it takes millions of years for it to be replaced.
Answer:
false
Explanation:
Penicillin prevents peptidoglycan from cross-linking properly in the last stages of bacterial cell wall synthesis. This greatly weakens the cell wall and causes the bacterium to lyse, or burst open, because of osmotic pressure. Penicillin is bactericidal because it directly kills bacteria.
