LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION –ADVANCED ZOOLOGY & BIOTECH.
TS 09
FOURTH SEMESTER – APRIL 2007
AZ 4500/ZO 4500 - EMBRYOLOGY & EVOLUTION
Date & Time: 21/04/2007 / 9:00 - 12:00
Part A
(Answer All)
1
2
3
4
5
6
7
8
9
10
Part B
Max. : 100 Marks
10 X 2 = 20
Define the term Amphimixis.
What are primordial germ cells?
Differentiate homolecithal from telolecithal eggs.
Comment on neural crest cells.
Distinguish epiboly from involution
Comment on “Agnostic period”.
Explain Mullerian mimicry
Differentiate transition from transversion
What are homologus organs
List down the three important characteristics of Homo sapiens.
(Answer any Four)
11
12
13
14
15
16
Part C
Dept. No.
4 X 10 = 40
Trace the development of eye in a vertebrate.
Explain the development of star fish
With suitable diagrams explain the formation of acrosome
Categorize the available fossil records.
Write notes on biochemical recapitulation
Summarise the changes in the evolution of modern horse.
(Answer any Two)
2 X 20 = 40
17 (a)What are extra –embryonic membranes?
(b)Illustrate and explain the development of extra- embryonic
membranes.
(c)Mention their functions.
18 (a)What are Graafian follicles?
(b)Explain the process of oogenesis.
(c)Write notes on chordate eggs and illustrate
19 Elaborate Lamarckism and NeoLamarckism.
20 Write an essay on speciation.
**********