Answer: Exhaled air consists of 78 percent nitrogen, 16 percent oxygen, 4 percent carbon dioxide and potentially thousands of other compounds.
Explanation: Does this help???
Answer:
B. Surface of the skin
Explanation:
If we had mucous on the surface of our skin then our skin would have a thick slippery fluid like substance on it all of the time. Mucuos membranes are present in the digestive tract, mouth, lungs, and more.
Answer:
d. method of studying
Explanation:
independent variables are what affects the dependent variable. the outcome that you are looking for (test performance) is the dependent variable. what affects the test performance is the change in method of studying, so that is the independent variable.
I might be wrong but i think its T
Answer:
yes my best friend Alisa we used to go to school together she is fun and she always helped me durn my exams and i used to get good grades everyone in the neighborhood loved her
Explanation:
i mean dose that work.