When the earth came into the existence the pollutants were very few. The amount of pollution has increased due to the increase in population and decrease in the natural resources. Their rates have increased many folds and have an adverse effect on the human health. ...

The mammalian are also known as mammals. They are warm blooded. The heart is 4 chambered in the mammals with 2 auricles and 2 ventricles. The renal system is not developed. The process of excretion and respiration occurs by a pair of kidneys which ...

The aves are also known as birds. They are bipedal and feathered. They are warm blooded. Their fore limbs are changed into wings. The heart is 4 chambered in the birds with 2 auricles and 2 ventricles. The renal system is not fully developed. The ...

There are lot of differences between a salamander and lizard. The salamander is amphibious and has moist skin. They have no scales and have 4 fingers and 5 toes. They have no claws and ear openings. They have a couple of parotid glands which are ...

There are a lot of differences between a turtle and a tortoise. The tortoises are half terrestrial and are large in size. They are mainly in fresh water form and have a carapace which is ovoid in shape. The turtles are aquatic and are smaller ...

The reptilia are also known as creeping vertebrates. They are cold blooded. They have epidermal scales with rough and dry skin. They do not have any glands. They have 24 cranial nerves. The skull has condyle which is single and has a vertebral column. The ...

There are many differences between a frog and toad. The frog has a triangular head with olive brown color body. It is diurnal and lays eggs in masses. They do not have a parotid gland but have well developed webs, while the toads have a ...

The amphibians are divided into different orders. This includes apoda, anura and urodela. The apoda are also known as gymnophiona. They have no limbs. The scales are present. They are referred as blind worms. The anura are also known as salientia. They are without the ...