Assam University 2007 B.Sc Zoology Diversity and Biology of Non-Chordates and Chordates and Developmental Biology - Question Paper

NTS-08/ZOOH-1 / 055
2008
Zoology
(Honours)
First Paper
(Diversity and Biology of Non-Chordates and Chordates and Developmental Biology)
TDC - Part-I (New Syllabus)
Full Marks : 70 Pass Marks : 21
Time : three hours
The figures in the margin shows full marks for the ques.

ans 5 questions, taking 1 from every Unit.

Unit- I

1. Enlist the cellular components of sponges. Name the kinds of canal systems in them. Illustrate with diagram, the Syconoid kind of canal system. Draw the vertical part of the body wall in Scypha. 2+1+(2+7)+2= 14

2. Differentiate ranging from Polyp and Medusa. Enumerate the life cycle of Obelia with necessary diagram. Comment on its metagenesis. 3+(2+6)+3 = 14

Unit- II

3. Enlist the distinctive features of Arthropoda and Mollusca. Enunciate with sketches, the
structure of cardiac stomach as seen in Palaemon. 3+3+(2+6) = 14

4. Write short notes on (any two) seven x2 =14
(a) Testicular nephridia of Leeches
(b) Locomotory structure and locomotion in Starfish.
(c) Compound eye and mosaic vision in Prawn.
(d) Illustration with diagrams of any 2 larval forms in Crustacea.

Unit - III

5. (a) Name the classes, the subsequent organisms belong to. Justify their inclusion in respective classes : two x5 = 10

(i) Bat (ii) Balanoglossus (iii) Pigeon (iv) Frog (v) House lizard.

(b) discuss the statement "All vertebrates are chordate but all chordates are not vertebrate" 4
6. Enunciate the characteristics of buccal funnel in lamprey with diagram. Draw and define the ammoecoetes larva. (2+3)+(2+5+2) = 14

Unit - IV

7. How does a Calotes change its colour? Illustrate the arterial system of Calotes with necessary diagram. 2+10+2 = 14

8. Write brief notes on (any two) seven x two = 14
(a) Parental care in Amphibia. (b) Characteristics of Marsupials (c) Air sacs and their role in Pigeon (d) Digestive system of Rat.

Unit - V

9. Enunciate the biogenetic legal regulations. Draw labelled diagrams of matured spermatozoon of mammal. Illustrate the process of oogenesis with necessary diagram. 3+3+6+2 = 14

10. Write short notes on (any two) seven x two = 14
(a) Cleavage kinds oand laws of cleavage. (b) Gastrulation in Amphioxus
(c) Acrosome reaction in fertilization (d) Spermatogenesis.

Earning:   Approval pending.