A. facultative anaerobes
Facultative anaerobes, can grow without oxygen but if oxygen is present; then, it will use the oxygen.
Letter B. is harmed when oxygen is present.
Letter C. its life is dependent on the presence of oxygen
Letter D. a virus that is dependent on the lifespan of the bacteria it is attached to. If the bacteria can't survive in oxygen, bacteriophages will die too.
Helicases are enzymes. During DNA replication, helicases are important because they SEPARATE double stranded DNA into single strands... allowing each strand to be copied.
They both transport ions, sugars, and salts across the membrane
Answer:
C.
Explanation:
All these carbon atoms are isotopes: they have the same amount of protons (in this case, 6 because carbon always has 6 protons) and the same amount of electrons (6 because the carbons given have a neutral charge).
Therefore, the only thing we are changing is the atomic mass and the amount of neutrons present in each isotope.
In Carbon-12, there are 6 protons, 6 neutrons, and 6 electrons.
In Carbon-13, there are 6 protons, 7 neutrons, and 6 electrons.
In Carbon-14, there are 6 protons, 8 neutrons, and 6 electrons.