They restricted to specific layers hope this helps
Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart.
Answer:
he theory challenged the idea that God made all animals and plants that live on Earth (creationism) there was insufficient evidence when the theory was published to convince many scientists. the mechanism of inheritance and variation was not known until 50 years after the theory was published.
Explanation:
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Answer: An amino acid.
Explanation: Every 3 bases on a strand of DNA is called a codon. Each codon has an amino acid that it codes for.