Go off kacey, as she should.
Answer:
D. Sound
Explanation:
Both А. water and B. fans doing the "wave" in a football stadium are both literal waves and are not examples of a compressional/longitudinal
Continents are land masses that exist on the surface of the earth. The continents are part of the uppermost layer of the earth which is called the crust.
A
CO₂ is the waste product of respiration of cells. Oxygen, on the other hand, is required in cellular respiration. Therefore at the alveolar in the lungs of an organism, CO₂ will be expelled while O₂ will be taken in.
Explanation:
This occurs passively due to the diffusion gradient, CO₂ usually has a higher concentration in the blood and lower concentration in alveoli hence this gas diffuses from the bloodstream into the lungs. On the other hand, oxygen is higher in concentration in the alveoli than in the blood capillaries hence difuses into the blood and taken to the cell for respiration. The CO₂ in the lungs is then expelled through exhalation of the lungs.
Learn More:
For more on gaseous exchange in the lungs check out;
brainly.com/question/12891596
brainly.com/question/2126516
brainly.com/question/12469601
brainly.com/question/2698578
#LearnWithBrainly
