Oxygen, nourishment (vitamins, lipids, fats, etc.)
<span>The answer is: at least at least 2 hours after a meal is when chest physiotherapy should be performed. This is the answer because performing chest physiotherapy closer than that to a meal will increase the risk of vomiting and aspiration. Also, performing it immediately before a meal could tire our the client and impair the ability to eat.</span>
<h2>
Answer:</h2>
The scientist started to study relationships among various groups of organisms <u>C. by using genetic analyses</u>.
<h2>
Explanation:</h2>
The following features were used to study about the relationships between different groups of organism:
- External morphology
- Similarities in structure
- Genetic analysis
- Chemical composition
The molecular similarities in the structure of RNA, DNA, and proteins help to establish the relationship of relationships between different groups of organisms. This was studied through testing the samples obtained by organisms using genetic analyses.
