BZYCT-131 ANIMAL DIVERSITY in English Solved Assignment 2020-2021

BZYCT-131 ANIMAL DIVERSITY

Solved Assignment 2020-2021

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Course Code: BZYCT-131
Assignment Code: BZYCT-131/TMA/2020-2021
Maximum Marks: 100

Title Name

BZYCT-131 Solved Assignment 2020-21

University IGNOU
Service Type Solved Assignment (Soft copy/PDF)
Course BSCG
Language ENGLISH
Semester 2020-2021 Course: B.SC(G) CBCS
Session 2020-21
Short Name BZYCT-131 (ENGLISH)
Assignment Code BZYCT-131/TMA/2020-2021
Product Assignment of BSCG 2020-2021 (IGNOU)
Submission Date This assignment is valid from 1st July, 2020 to 30th June, 2021. If you have failed in this
assignment or fail to submit it by June, 2020, then you need to get the assignment for the year
2021-22, and submit it as per the instructions given in the Programme Guide

 

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Note: Attempt all questions. The marks for each question are indicated against it.
Part-A Maximum Marks: 50
1. Fill in the blanks with suitable words:
a) Digestion is ……………… in Branchiostoma.
b) Elasmobranchs have a ……………… mouth.
c) The flagellated chamber of the canal system of sponges is lined by
……………… .
d) The ……………… of the filarial worm releases small microfilariae into
blood and lymphatic system.
e) The special comb-like sense organs of scorpions are ……………… .
f) The fused pair of maxillae of millipedes is called ……………… .
g) ……………… is the only living genus under the subclass Nautiloidea.
h) In cephalopods a pair of ……………… hearts pump the blood through the
gills.
i) Nephridia are ……………… in hemichordates.
j) The bipinnaria larva of ……………… is similar to tornaria larva.
(10)
2. Describe parental care in amphibians. (10)
3. What is parasitic adaptation? Explain the adaptations that have taken place in
Ascaris lumbricoides.
(10)
4. Write short notes on the following :
a) Book lungs of Arachnida
b) Pectines of scorpions
(10)
5. What is meant by torsion? Explain the process in detail. (10)
Part-B Maximum Marks: 50
6. Sate whether the following statements are True (T) or False (F)
i) Presence of cranium and paired appendages is a characteristic feature of
Agnatha.
ii) Gonangium is a sexual way of reproduction.
iii) The excretory organs of crustaceans are called antennary or maxilliary
(10)
Assignment Code: BZYCT-131/TMA/2020-2021
4
glands depending on their position.
iv) The two pairs of insect wings are articulated with pro and mesothorax.
v) The secretion of prothoracic glands regulates metamorphosis in insects.
vi) Class Xiphosura is regarded as living fossil.
vii) Development in bivalves includes trochophore and veliger larvae.
viii) The blood of cephalopods contains haemocyanin.
ix) In brittle stars tube feet aid in locomotion.
x) Aristotle’s lantern is a complex chewing organ of sea urchin.
7. Describe canal system in Porifera. (10)
8. a) Write unique features of Phylum Ciliophora.
b) State the affinities of Hemichordates with Echinoderms.
(5)
(5)
9. Describe the important adaptations found in birds that allow them to fly. (10)
10. a) Describe the most important adaptations in reptiles that allowed them to
make a complete transition from water to land environment.
b) Differentiate between the following pairs:
i) Orders Perissodactyla and Artiodactyla
ii) Infra classes Eutheria and Metatheria

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BZYCT-131, BZYCT 131, BZYCT131

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