Uses of DNA Sequencing in Classification (Super Easy)
1. Tells how similar two organisms are
If their DNA matches a lot → they are closely related.
If DNA is very different → they are not related.
2. Helps in correct grouping
Sometimes animals/plants look similar but are not actually related.
DNA helps put them in the right group.
3. Helps identify new species
When scientists find a new organism, they compare DNA.
If the DNA is unique → it's a new species.
4. More accurate than comparing looks
Looks can be confusing (example: dolphin vs fish).
DNA is inside every cell, so it gives correct information.
5. Helps understand evolution
DNA shows which species came first and which evolved later.
6. Helps make family trees of organisms
DNA helps scientists make evolutionary trees showing who is related to whom.
7. Works even when body parts look different
Even if two organisms look different, their DNA can show hidden similarity.
Super Short Exam Answer (3–4 Marks)
DNA sequencing helps in classification by showing how similar the DNA of different organisms is. Similar DNA means close relationship. It helps correct wrong groupings, identify new species, understand evolution, and make accurate family trees of organisms.