2 0 2 0
B.Sc (II Semester) Examination
ZOOLOGY
Paper : Zoo/T2/121
( Vertebrates Biosystematics, Comparative Anatomy and Evolution )
Full Marks : 50
Pass Marks : 35%
Time : Two Hours
Note : 1. Answer all questions.
2. The figures in the margin indicate full marks for the questions.
1. Answer the following questions : 2×5=10
(a) Name the scale found in the skin of cartilaginous fishes.
(b) Name the bones that make the pelvic girdle in mammals.
(c) Write the names of two anuran amphibia.
(d) What is the cranial capacity of modern man?
(e) Who wrote the book, Descent of Man?
2. Answer any four of the following : 4×4=16
(a) Write the characteristic features of metatherian mammals.
(b) Differentiate between amphibian and reptilian heart structure.
(c) Write a note on Homo sapiens neanderthalensis.
(d) Mammals exhibit thecodont and diphyodont dentition. Explain.
(e) Explain the structure of amphibian integument.
(f) Write the salient features of Urochordata.
3. Answer any three of the following : 8×3=24
(a) What do you mean by migration in birds? Discuss the factors that trigger migration in birds.
(b) What is adaptive radiation? What led to the adaptive radiation of mammals? Discuss with examples.
(c) What are the salient features of Pisces? Classify fishes up to subclass with examples.
(d) How does the urinogenital system work in vertebrates? Discuss urinogenital system in amphibians.
(e) Differentiate between poisonous and non-poisonous snakes citing examples and suitable diagrams.
