<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.
The role of xylem is to transport water and some nutrients from roots to shoots and leaves.
Scanning electron microscope is the answer.This type of microscope<span> is an instrument for observing at the atomic leve</span>
It is called urea
hope this helps
