write the general characters of fishes, amphibians and reptiles.
Answers
Answer: general characters are -
(1) fishes -
a) A notochord, both in larvae and adults.
b) Seven or more paired gill pouches.
c) The branchial arches, a series of arches that support the gills of aquatic amphibians and fishes, lie close to the body surface.
d) A heart with two chambers.
e) Reproduction using external fertilization.
(2) amphibians-
a) Unshelled Eggs. Living amphibians produce much different eggs than strictly terrestrial organisms like reptiles do. ...
b) Permeable Skin. While caecilians have scales similar to fish, most other amphibians have moist, permeable skin. ...
c) Carnivorous Adults. ...
(3) Reptiles-
a) All reptiles have a backbone, which means they are vertebrates.
b) All reptiles produce eggs. Most reptiles lay hard-shelled eggs, but a few give birth to live young.
c) All reptiles have scales or scutes.