Evolution || Class 9 Science Notes

Forore details visit this website : https://kitabguider.blogspot.com/?m=1 Short answer type questions:

a. Define organic evolution.

→ Organic evolution is the process of gradual and older changes in organisms from one form to another.

b. What are fossils?

= Traces and preserved remnant of dead animals and plants are called fossils.

c. Define embryo.

→ An embryo is defined as a multi-cellular structure, that is developed from the zygote which give rise to offspring generally present inside the female tissue or egg -membrane.

d. Define palaeontological evidence.

= Palaeontological evidence is considered as the strongest evidence of evolution.

e. Define homologous organs.

→Homologous organs are those organs which have a similar embryonic origin and basic structure but different functions.