How would a scientist justify choosing cellular organisation as a more fundamental. Class 9

How would a scientist justify choosing cellular organisation as a more fundamental. Class 9

Question 1.

How would a scientist justify choosing cellular organisation as a more fundamental characteristic for the basis of classification rather than the presence of xylem and phloem? Class 9

Answer:

Cellular organisation (whether the organism is unicellular or multicellular, and whether it has a true nucleus) is a basic and fundamental feature present in all living organisms. It shows the level of body design.

Xylem and phloem are found only in some plants and are not present in animals or simpler organisms. Therefore, cellular organisation is a more basic criterion for classification than the presence of xylem and phloem.

Question 2.

You find an unlabelled slide of a single-celled organism that has a well-defined nucleus and multiple cilia. Which group would it most likely belong to? Give reasons. Class 9

Answer:

It would most likely belong to the group Protista. This is because it is:

1. Single-celled
2. Has a well-defined nucleus (eukaryotic)
3. Has cilia for movement
4. These are key features of protists like Paramecium.