<h2>What is the atmosphere attracted by earth</h2>
<h3> Let's begin.</h3>
Our Earths magnetic field may be to blame.
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Answer:
they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.
The walls of the alveoli are only one cell thick. This makes the exchange surface very thin - shortening the diffusion distance across which gases have to move. Each alveolus is surrounded by blood capillaries which ensure a good blood supply.Adaptations of the alveoli:
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. Permeable walls - allow gases to pass through.
Explanation:
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Answer:
weathering occurs when rocks sit in a pool of salt water. weathering or eroding
Explanation:
Answer:
C. Dr
Explanation:
Gametes only carry one allele for each trait
