I23/1
2005 ZOOLOGY
Paper 1
TlflU' HouTs 1 I Maximum Alarhs 300
INSTRUCTIONS
Each question is printed both in English and in Kannada.
Answers must be written in the medium specified (English or Kannada) in the AdmissIOn issued to you, which must be stated cleorly on the couer of the ans/{Jcr book in the space provided (or this purpose. No credit will be given for the alIs/ocr.'> written in a medium other than that specified in the Admission Tichet. In rase any doubt m the Kannada text, please reler to English text.
This paper has four parts:
A 20 marks
B 100 marks
C 90 marks
D 90 marks

Marks allotted to each question arc indicated in each part.
All question.s in Part Part B and Part C are compulsory. Answer any three questwns in Part D.
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23/1 I PART A
Write short notes in about 50 words each. Each question carries 5 marks.
1. Types and organisation of Canal System in Poriferans
Nutritive value of honey
Preventive measures against air pollution
Fossil reptiles

(3I 23/1


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23/1 14
PART B
Answer each question in about 100 words. Each question carnes 10 marks.
1.
State the differences between Hormones and Pheromones.

2.
Why is there always a loss of chemical energy with each step In a food chain?

3.
State the structure, location and functions of Ampulla of Lorenzini.

4.
Identify and comment on the many beneficial aspects of insects.

5.
Write about the aerial adaptations in birds.

6.
State the functions of coelomic fluid in earthworm.

7.
Describe the book lungs in scorpion.

8.
Explain the theory for locomotion in Amoeba.

9.
Give the affinities of peripatus with respect to Annelida, Arthropoda, Onychophora and Mollusca (Two to three points each),

10.
Give a brief idea about migration in birds.



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PART C 6x15=f
Answer each question In about 150 words. Each question carnes 15 marks.
1.
What is ex situ conservation Explain the two modes of ex situ conservation in animals.

2.
Explain the different types of intra-and inter-specific interactions III an ecosystem.

3.
Briefly explain the life history of Fasciola and outline the parasitic adaptations.

4.
Describe the activational effects on the hormonal influences on behaviour.

5.
Name the poisonous and non-poisonous snakes in India. With a neat diagram of the poison apparatus, discuss the chemical nature of snake venom.

6.
What are the different stages in the colonization of hydrosere



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PART D 3x30=i
Answer any three of the following questions, each m about 300 words. Each question carries 30 marks.
1.
What is 'Ecological pyramid' Explain different types of ecological pyramids.

2.
Explain the terms 'Chronobiology' and 'Biological clock'. On the basis of chronobiology, brive an account of various rhythms in the biological system.

3.
Describe the circulatory system in cockroach.

4.
Give a comparative anatomy of heart in fishes, amphibians, reptiles, birds and mammals.

5.
Define 'Population' and 'Sample' as applied to Statistics and explain correlation coefficient and "t" test as measures of variation.


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1 23/2 I
2005
ZOOLOGY
Paper 2
Tune: 3 Hours J f Maximum Marks.' 300

INSTRUCTIONS
Each question is printed both [II English and in Kannada.
Answers ml/si be Written in the medium specified (English or Kannada) III the Admission Tichet Issued to you, which must be stated clearly on the cover of the answer book in the space provided for "us purpose. No credit will be gl:ven for the an.'}/ucrs llTitten in. a medium other than that specified in the AdmiSSIOn Ticket, In case of an,V doubt in the Kannada text, please refer to English text.
This paper has four parts:
A 20 marks
B 100 marks
C 90 marks
D 90 marks

Marks allotted to each question arc indicated in each part.
All questiolls in Pari Part B and Part C are compulsory. Ans/Dcl' any three questions m Part U.



1
23/2 I2)
PART A
Write short notes in about 50 words each. Each question carrie8 5 marks.

1. Regualtory Enzymes

Lampbrush Chromosomes


Difference between Cleavage and Mitosis


Lysosomes


31 23/2


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23/2 (4

PART B lOxlO=lOO
Answer each question m about 100 words. Each question carnes 10 marks.
1.
Name and explain the second law of Mendel. What fortunate circumstance favoured Mendel in obtaining the classical ratio?

2.
Give a brief idea about the various patterns of cleavage.

3.
What is the significance of Hardy-Weinberg Jaw?

4.
What is 'Muscle' Distinguish between muscle, muscle fibre, myo·fibril and mya-filament.

5.
What are 'Leucocytes' Classify vanous types of leucocytes mentioning their features.

6.
Give the faunal diversity in the Zoogeographic realm of Australia.

7.
What is 'Placenta' Give its functional significance.

8.
How can pheromones be used in controlling insect population?

9.
Explain the mechanism of action of peptide hormones.

10.
Explain "Glucose homeostasis" and give a schematic diagram showing the interrelationship between the hormones of fe.:ding and fasting.


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PART C
Answer each question m about 150 words. Each question carnes

1
15 marks.
1. Describe the Watson and Crick model of DNA.
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2.
What is 'Mutation' Explain the various types of mutations.

3.
Describe the structure of immunoglobulin. 1

4.
What are 'Enzyme inhibitors' State the different categories of inhibitors.


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5.
What is a 'Synapse' How is an impulse propagated across the synapse?

6.
Explain the free radical theory of ageing and mention the changes in the


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ageing.
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23/2 (8 I
PART D

Answer any three of the following questions, each In about 300 words. Each question carries 30 marks.
1.
Write a comprehensive account of hormonal control of the menstrual cycle.

2.
Explain the working mechanism of lac operon.

3.
What is 'Speciation' Explain the various isolating mechanisms favouring speciation.

4.
Explain the various structural models of plasma membrane. Add a note on the functions of plasma membrane.

5.
Explain what is used, what is produced and what is accomplished by the Krebs citric acid cycle.


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