Question

Please mark as brainliest.​

Answer 1

Answer:

1. In yeast, anaerobic reactions make alcohol whereas in muscle cells, anaerobic reactions make lactic acid.

2. Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. 

3. The break down of glucose occurs in mitochondria.

4. The percentage of oxygen is 21% and of carbon dioxide is approximately 4%.

5. The trachea serves as passage for air, moistens and warms it while it passes into the lungs, and protects the respiratory surface from an accumulation of foreign particles.

6. Two organisms that breathe through their skin are Earthworms and frogs.

7. Respiration is a vital function of the body because it provides energy for carrying out all the life processes that are necessary to keep the organisms alive.