The task of the respiratory system is the exchange of Oxygen and Carbon Dioxide within the body; however, the respiratory system alone has no mechanism for the transfer of oxygen from the lungs to the body for absorption and transfer of carbon dioxide from the body for expulsion. The cardiovascular system assists in this by moving oxygen-saturated blood from the lungs to different parts of the body and carbon dioxide rich blood from the body to the lungs.
Answer:
There are a variety of ways in which bacteria can be harmful, the primary one being direct pathogenesis of humans. Bacteria can infect and damage human tissues through several different mechanisms. Many bacteria secrete toxins, which allow them to kill competitor bacteria and/or damage eukaryotic cells, thus gaining a competitive advantage.
Explanation:
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Answer:
C. The weight loss of the mice
Explanation:
There are two variables present in the experiment;
- The time of the day that the mice rane
- The weight lost of the mice in each time test
The time of the day varies from morning, noon to evening. This variable is independent of any other aspect.
It shall always be morning noon and evening in every single day.
The time of the day shall determine the amount of weight loss.
Each time shall vary in the amount of weight loss.
Thereby weight loss becomes our dependent variable.
I think the answer might be A or B. Not so sure...
