LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
FIRST SEMESTER – NOVEMBER 2012
ZO 1819/1813 – PHYLOGENY OF INVERTEBRATA & CHORDATA
Date : 01/11/2012 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
Part-A
Answer All the questions: (10×2=20 Marks)
- Give the dental formulae of the following
- a) Dog b) Rabbit
- Write the Zoological name of the following
- a) Camel b) Shark
- What is pigeon’s milk?
- Distinguish heterocercal tail from reversed heterocercal tail.
- Write short notes on placoid scales
- Differentiate Quil and Filoplume feathers.
- Write any four flight adaptation of birds.
- What is paleontological question mark?
- What is ductus caroticus?
- Name the air sacs of birds.
Part-B
Answer any FOUR questions: (4×10=40 Marks)
- Give an account of the origin and evolution of chordates with reference to geological time scale.
- Write notes on the exoskeleton of invertebrates and chordates.
- Give an account of the morphology of Brachiopoda.
- Explain the pathogenecity, control, treatment and causes of the parasite Entameoba.
- Write notes on the flight adaptations.
- Classify placenta based on the distribution of chorionic villi.
Part-C
Answer any TWO questions: (2×20=40 Marks)
- Write an essay on Ostracoderms and explain the evolution of Agnatha.
- Give a comparative account on the heart of invertebrates and chordates and highlight the phylogeny.
- Write an essay on the pathogenecity, life cycle and control of Plasmodium vivax.
- Give an account on the adaptive radiation of reptiles.
