Answer: B. a moving cold air mass
A warm front is defined as the transition zone where a cold air mass is replaced by a warm air mass. Warm fronts generally move from southwest to northeast (not rising, but moving nor trapped) and the air behind a warm front is warmer and more moist than the air ahead of it.
Answer:
I believe the answer would be B because if I'm sure the bottom is grain which has higher levels in grain and glucose I believe and that doesn't produce energy . The second level is meat and that has protein which give us strength.
<h2>Exchange of Gases in the lungs</h2>
Explanation:
- Gas exchange occurs by process of <u>diffusion.</u>
- Gas exchange occurs in sac like structures called <u> alveoli.</u>
- <u>Oxygen</u> diffuses from the alveolar sacs into the blood in the capillaries.
- <u>Carbon dioxide</u> diffuses from the blood in the capillaries into the alveolar sac .
As blood passes through the lungs, it picks up oxygen and gives up carbon dioxide simply by diffusion down partial pressure gradients between blood and Alveoli,.
The blood having returned from body is relatively low in oxygen and high in carbon dioxide. On the other hand the alveolar air has higher oxygen concentration and lower carbon dioxide concentration.
Thus, when venous blood flows through pulmonary capillaries, oxygen moves from alveoli into the capillaries while carbon dioxide flows from capillaries into the alveoli.
A Description of the Difference Between Carbohydrates<span>, Proteins, </span>Lipids<span> and Nucleic Acids. Macromolecules are large molecules within your body that serve essential physiological functions. Encompassing </span>carbohydrates<span>, proteins, </span>lipids<span> and nucleic acids, macromolecules exhibit a number of similarities.</span>