B, because all have similarities, not just some
Answer:
Atoms are the smallest unit of an element
Explanation:
There's nothing smaller than atoms!!!!
Answer:
the reactants of photosynthesis are water and carbon dioxide which react in the presence of sunlight to give out oxygen and glucose during the day
Antigens are found on the surface of viruses
Answer:
The sun
Explanation:
The is because the sun is the souce of energy
