B.
Groups of similar cells that do a particular job.
Answer:
If <u>bacterial plague</u> (a.k.a. dental plague) accumulates around the teeth over a period of time, periodontal disease may result.
The answer is D. Sperm cannot be produced under the normal body temperatures so they’re placed outside the body where it’s not as hot
Carbon dioxide is released during respiration but used up during photosynthesis. The reason that plants release oxygen is because the amount of carbon dioxide released by the plants is, for the most part, used in photosynthesis; however, all of the oxygen produced is not used in respiration. Thus, the net outflow of gas from a plant is that of oxygen.
