Modern Text Book of Zoology Vertebrates

Modern Text Book of Zoology Vertebrates

R. L. Kotpal

Language: English

Pages: 883

ISBN: 8171338917

Format: PDF / Kindle (mobi) / ePub


The book has been written to cater for the long lasting needs of Indian students as it is almost impossible for them to chose any single textbook on vertebrates. It is intended primarily as a textbook for the Honours and the Undergraduate students of the Indian Universities. However, the students of higher classes, the candidates preparing for various competetive examinations, and the subject teachers may also find it useful as a handy guide for reference. The book follows essentially the pattern set earlier by my textbook on the Invertebrates. Thus, important Indian animal types have been described first, followed by chapters on characters, classification, other types and general topics of different classes of Vertebrates. Introduction to the Chordates and chapters on Protochordates, Osteology, Embryology and Histology of Vertebrate types have been arranged in separate SECTIONS to achieve better understanding and to avoid unnecessary repetitions. Topics have been selected with great care and treated in a simple and lucid style. Characters and classifications have been simplified and controversies avoided to benefit our young readers. Illustrations have been specially designed with great dexterity, accurately, and in conformity with their textual descriptions. It has been my best endeavour to furnish maximum information, sufficient for the students, in simple language, obtained after sifting and filtering through several foreign textbooks as well as periodicals and journals.

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MODERN TEXT BOOK OF ZOOLOGY v T [ ANIMAL DIVERSITY - II ] R.L.KOTPAL FORMERLY, PROFESSOR AND HEAD DEPARTMENT OF ZOOLOGY MEERUT COLLEGE MEERUT MODERN TEXT BOOK OF ZOOLOGY [ANIMAL DIVERSITY - II] NEW DELHI OFFICE: 9, R AN I ]H ANS I ROAD ( MO TI A KH AN) NEW DELH I 11 0055 MODERN TEXT BOOK OF ZOOLOGY VERTEBRATES ISBN 81-7133-891-7 ISBN No. : 978-81-7133-891-7 © RESERVED AI/ rights reserved. No part of this book (allY editioll/reprint) may be produced, stored in a retrieval system or.

Controversial. them Chordata lowest group. But the them is the presence of hemichordates the credit of of the chordates. But the dorsal of lack line of chordate evolution. the Echinodermata ancestral stock and Hemichordata also did not stand on the direct line of but formed offshoot are on but not on the same track. Since arose from the ancestral line the ancient Echinodermata are the true 28 J IMPORTANT » Long Answer V'U,..,"'A Questions Describe the general organization account of.

Embryonic or larval trait the adult Ex;~ml)les of Ileoteny adult nquatic cartilaginous endoskeleton adult elasmohrauch fishes and the external retention salamanders. III COlltrast, paedogenesis emphasizes the premature development of gonads in the larval body, which undergoes metamorphosis. vtlt,dlJlnOlvhl}sis. IMPORTANT Answer Enlist the » Multiple Cllou:e Qu.estio1l!i 3. ANSWERS 7. (d) (a) s 1. series This t'.... 'oh"'mf'.,. scales. ostracoderm internal axial endoskeleton or.

From Skin in Lateral line and pores. A runs over ,nr'IAr'mvm sensory lateral line canal at intervals to out~ide minute pores. pores. O n the head and open several groups the called exude mucus. of is coarse and has the feel of sand is due to hard and called or The the skin ectoderm al mesodermal corium or dermis inner is of many cells in young stage, are ciliated but at adult stage the cilia are lost. Basal or innermost made columnar or whieh rests a basement membrane. Cells of outer.

And dentine are vitrodentine is of ectod,ernna! A not Its from while the basal tooth 3. Homology of scales. Placoid scales are to be the forerunners of vertebrate ectodeml but its presence is denied in the it has vitrodentinc which is said to cells. Thus mesodermal like the teeth. and are are structure that the teeth scales. In the skin scales teeth. With are prey. As the mouth has The been Vertebrate an enamel from remams embedded. Fig. KeSnllra[OI~ and ph:vsi('lo~:y of.

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