Answer:
Air pollution is a mix of particles and gases that can reach harmful concentrations both outside and indoors. Its effects can range from higher disease risks to rising temperatures. Soot, smoke, mold, pollen, methane, and carbon dioxide are a just few examples of common pollutants.
Explanation:
Darwin made numerous observations and collected evidence that led him to purpose a revolutionary hypothesis about the way life changes over time. I hope this helped :)
There are (2) DNA molecules.
Answer: Protons
Explanation: Inside the nucleus of an atom are the neutral charged neutrons and the positively charged protons. Because of this the nucleus is positively charged
Answer:
hydrogen bonds , a helix , b pleated sheet
Explanation:
