Five kingdom classification-Biology

1. CLASS PISCES CHARACTERS
Include fishes
 Skin coveredin scales
 Ectothermic, cold blooded
 Soft shelledeggs that must be laid in water
 External fertilization
 All members are fully aquatic
 Limbs modified into fins
 Gas exchange through gills
Eg: Rohu,catla
CLASS AMPHIBIA CHARACTERS
 Skin is thin, soft, glandular
 Ectothermic(Coldblooded)
 Both gill ,skinand lung breathers - usually gills in the larval stage,
replacedby lungs in the adult
 Three-chamberedheart with two atria and one ventricle
 External fertilization
 Lays eggs
 Use all the four limbs for movement
Eg: Frog,toad
CLASS REPTILIA CHARACTERS
 cold-bloodedanimals
 skin coveredin scales
 legs are short or entirely absent
 they lay eggs
 respiration by lungs
 three chambered heart except crocodile. Crocodile has four chambered
heart
Eg: Snake,lizards

2. CLASS AVES CHARACTERS
Include birds
 Waterproofskin coveredin feathers
 Endothermic, warm blooded
 Hard shelled eggs that are waterproof(cleidoic - closedegg)
 Beak orbill rather than teeth
 Bipedal (walk on two legs only)
 Forelimbs developedinto wings
 Mostmembers are highly adapted for flight with forelimbs modified as
wings and many weight saving features suchas hollow bones
 4 chambered heart
CLASS MAMMALIA CHARACTERS
1) Warm blooded.
2) Hair in the body
3) Endothermic. (warm blooded)
4) Four chambered heart.
5) Mammary glands are used to produce milk to nourish their young. Female
glands are the only functional glands.
6)respiration through lungs
7) give birth to young ones