Zoology

AN INTRODUCTION TO AVES (BIRDS)   Birds (AVES) are highly evolved vertebrates. In the Jurassic…
In Reptiles the “organs of Jacobson” are well developed sac like chambers. They lie below…
The trunk of chelonia is enclosed by Shell which has two parts, a dorsal carapace…
Snakes consisting Poison Apparatus by the contraction of digastric muscles in Poison Apparatus in snake…
It has a pair of poison glands, or ducts and a pair of fangs. The…
Based on characters Reptiles is divided into Four sub class   ANAPSIDA PARAPSIDA DIAPSIDA SYNAPSIDA…
AN INTRODUCTION TO REPTILES   In the carboniferous period of palaeozoic era “Reptiles” arose from…
Amphibian include anurans, urodelans and apodans. In all these groups of amphibians we come across…
Neoteny is defined as the failure or delay of larva to metamorphose while becoming sexually…
Based on characters of amphibians the present day (extant) amphibians are classified Into 3 orders.…
Amphibians are cold blooded vertebrates. In the Devonian period of palaeozoic era they were originated…
Amphibians are the earliest tetrapods. They were descended from fish like ancestors. They were developed…
On the upper and lower surfaces of the head a number of tin- branched structures…
It lies in the auditory capsule of the skull. It is useful for maintenance of…
In male shark claspers are present. The claspers are rod like copulatory organs present on…
In Scoliodon the olfactory lobes are olfactory organs or nasal sacs.   They are present…
On the lateral sides of think and tall lateral line canals are present. They are…