Explanation:
mass is a weight ofan object .
Answer:
Earth is the third planet from the Sun at a distance of about 93 million miles (150 million km).
Answer:
many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
Explanation:
The answer is bioaccumulation. Bioaccumulation is when toxins build up in a food chain. The animals at the top of the food chain are affected most severely because the concentration of toxin becomes most concentrated in the body tissues of the animals at the top of the food chain.
Its the first layer of protection in the atmosphere against radiation from the sun and its harmful U.V. rays.
