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Zoology

In Reptiles the “organs of Jacobson” are well developed sac like chambers. They lie below…
Friday, 30 June 2017 20:22

CARAPACE AND PLASTRON

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The trunk of chelonia is enclosed by Shell which has two parts, a dorsal carapace…
Friday, 30 June 2017 19:18

BITING MECHANISM OF A SNAKE

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Snakes consisting Poison Apparatus by the contraction of digastric muscles in Poison Apparatus in snake…
Friday, 30 June 2017 18:55

POISON APPARATUS IN SNAKE

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It has a pair of poison glands, or ducts and a pair of fangs. The…
Friday, 30 June 2017 16:58

CLASSIFICATION OF REPTILES

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Based on characters Reptiles is divided into Four sub class   ANAPSIDA PARAPSIDA DIAPSIDA SYNAPSIDA…
Friday, 30 June 2017 16:25

GENERAL CHARACTERS OF REPTILES

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AN INTRODUCTION TO REPTILES   In the carboniferous period of palaeozoic era “Reptiles” arose from…
Friday, 30 June 2017 15:28

PARENTAL CARE IN THE MEMBERS OF CLASS AMPHIBIA

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Amphibian include anurans, urodelans and apodans. In all these groups of amphibians we come across…
Friday, 30 June 2017 15:03

PAEDOGENSIS OR NEOTENY IN AMPHIBIANS

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Neoteny is defined as the failure or delay of larva to metamorphose while becoming sexually…
Friday, 30 June 2017 13:39

CLASSIFICATION OF AMPHIBIA

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Based on characters of amphibians the present day (extant) amphibians are classified Into 3 orders.…
Friday, 30 June 2017 13:22

GENERAL CHARACTERS OF AMPHIBIA

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Amphibians are cold blooded vertebrates. In the Devonian period of palaeozoic era they were originated…
Friday, 30 June 2017 13:07

AN INTRODUCTION TO AMPHIBIANS

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Amphibians are the earliest tetrapods. They were descended from fish like ancestors. They were developed…
Friday, 30 June 2017 12:55

AMPULIAE OF LORENZINI IN FISHES

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On the upper and lower surfaces of the head a number of tin- branched structures…
Friday, 30 June 2017 12:19

INTERNAL EAR OF SHARK (OR) MEMBRANOUS LABRYTH

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It lies in the auditory capsule of the skull. It is useful for maintenance of…
Friday, 30 June 2017 11:50

CLASPERS IN SHARKS

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In male shark claspers are present. The claspers are rod like copulatory organs present on…
Friday, 30 June 2017 11:31

OLFACTORY LOBES IN SHARKS

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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…
Thursday, 29 June 2017 19:44

CLASSIFICATON OF PISCES (FISHES)

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The super class Gnathostomata includes craniates, in which one pair of the visceral arches is…
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