KEY POINTS
- According to modern system of taxonomy, living organisms have been classified into Five Kingdoms.
- Classification means sorting out things into group on the bases of similarities and differences.
- Algae are unicellular, colonial and multi-cellular organisms.
- Algae are found in ponds, lakes and oceans.
- Volvox, spirogyra and chlamydomonas are algae actually.
- Fungi are some unicellular and some multicellular.
- Vertebrates are those animals which have back-bone in their bodies.
- Vertebrates are further classified into five classes i.e. fish, amphibians, reptiles, birds and mammals.
- Fish live in water and breathe through gills. Trout, salmon, rohu etc. are the example of fishes.
- Amphibians can live both in water and on land. Mostly their skin is moist and slippery. Frogs and toads are the example of amphibians.