How to control noise pollution?
admin There are many methods which help to control the noise pollution. The source of noise must be reduced. The path of transmission of sound must be stopped and the receiver…
Explain the phylum chordata?
There are certain characteristic features of the phylum chordata. They have a notochord which is like a solid and stiff rod. It is flexible and is present on the mid…
Explain the classification of phylum chordata?
The phylum chordata is divided into different sub phyla. These are known as the urochordata, cephalochordate and vertebrata. They all have different features and they are described below. The urochordata…
Explain the agnatha of vertebrata which belongs to the phylum chordata?
The agnatha are also known as the jaw less vertebrates. They do not posses jaw and are primitive type of organisms. They have notochord throughout their life. They are cold…
Explain the gnathostomata of vertebrata which belongs to the phylum chordata?
These are also known as the jaw vertebrates. In this case the notochord is present in the embryo stage. It disappears in the adult stage and is replaced by the…
What is the difference between a lamprey and hagfish?
There are a lot of differences between a lamprey and hagfish. The lamprey occurs in the fresh water as well as act a marine. It acts both as a parasite…
What is the difference between a Pisces and tetrapoda?
There are a lot of differences between a Pisces and tetrapoda. The pisces include the fishes which have paired appendages known as pectoral and pelvic fins. They respire by gills…
Explain the chondricythes of vertebrata which belongs to the phylum chordata?
These are also known as the cartilaginous fishes. They have an endoskeleton of cartilage and are cold blooded. The placoid scales form the exoskeleton and are dermal in origin. They…
Explain the osteichthyes of vertebrata which belongs to the phylum chordata?
These are also known as the bony fishes. They have an endoskeleton of cartilage which occurs in the embryo form and have a bony cartilage in the adult form. They…
Explain the lung fish of vertebrata which belongs to the phylum chordata?
The lung fish is divided into different classes. These include neoceratodus, lepidosiren and protopterus. All of them have a heart which is 3 chambered. The neoceratodus is known as Australian…