Answer:
genes
Explanation:
genes determine your body;s characteristics such as hair color or their eye color.
Water, carbon, and nitrogen
Answer:
Flatworms and cnidarians
Explanation:
In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist so that gases diffuse quickly via direct diffusion. Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane
The study of life. But since it's your opinion add how you feel about it.
