Bachelor’s Degree Programme (BSCG) – ANIMAL DIVERSITY Solved Assignment Answer | BZYCT 131 | 2021-2022

Free BZYCT 131 Solved Assignment Answer | ANIMAL DIVERSITY | For July 2021 – June 2022

IGNOU BZYCT 131 Solved Assignment, This assignment is the curriculum of the BACHELOR’S OF Science (BSCG) program. For other courses, students check our website categories section to find their courses and assignments over there.

BZYCT-131 ANIMAL DIVERSITY Solved Assignment 2021-2022

IGNOU BZYCT-131 ANIMAL DIVERSITY assignment is 100 marks. There is only two sections i.e. – A, B. Students have to answer all the questions. Download IGNOU BZYCT-131 Assignment free without any registration, Students can easily download the IGNOU assignment question paper from the official website of the university. They are not required to pay any fees or charges for this.

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The answer of BZYCT-131 | ANIMAL DIVERSITY | Solved Assignment 2021-2022:

Note: Attempt all questions. The marks for each question are indicated against it.

Part – A

1. Fill in the blanks with suitable words:
a) Protists with delicate thread-like pseudopodia belong to a group ……………… .
b) The coelom that is formed by enlargement of the split in the mesoderm is termed ……………… .
c) Hexactinellida are characterized by the presence of …………… spicules.
d) Ascaris lumbricoides live as ……………… anaerobe as the availability of oxygen is very less.
e) The different segmental appendages of various arthropods are said to be ……………… organs.
f) The cavity enclosing the gonads and the end sacs of the excretory organs in crustaceans is the ……………… .
g) Some cephalopods have ………………. filled shells to maintain their ……………… in water.
h) The endoskeleton of most echinoderms is formed of ………………… .
i) Epitoky is a characteristic feature of ………………….. .

2. i) Describe the canal system in Porifera.
ii) What do you mean by polymorphism? Explain the functions of various polymorphic forms of Hydrozoa.

3. i) Name three important characters of Platyhelminthes for considering them more advanced than cnidarians.
ii) What is parasitic adaptation? Explain the adaptations that have taken place in Ascaris lumbricoides.

4. a) What are true coelomates? Discuss their advantages.
b) “Insects have dominated the terrestrial environment”. What are the reasons for the success of insects in the terrestrial environment?

5. a) Write brief notes on :
i) Shell in Bivalvia
ii) Crystalline style
b) Describe the water vascular system of a sea star.

Part – B

6. State whether the following statements are True (T) or False (F)
i) All lampreys are hermaphrodites.
ii) Ammocoete larvae metamorphose into adults in 3 to 7 days.
iii) The pattern of the structure of limbs and girdles found in amphibians is different from those found in higher tetrapods.
iv) Gills are used as respiratory organs in larvae of Anura and in adults of urodeles.
v) Birds and crocodiles belong to a monophyletic group.
vi) In snakes, spur-like rudiments of hind legs are only present in the cobras.
vii) The feather of birds consists of more than 90% of a particular type of alpha keratin, which is protein.
viii) Most female birds have only the right ovary and oviduct.
ix) The newborn babies of deer and horses are precocial.
x) Cynodonts developed homodont teeth.

7. a) Name five hallmarks shared by all chordates, and explain the function of each.
b) Describe the common morphological features of hagfishes and lampreys. How do they differ from each other?

8. a) Why do marine teleosts need to drink large amounts of seawater? How do the freshwater teleosts overcome their osmoregulatory challenges?
b) Explain the mechanism of circulation in amphibians.

9. a) How are tuataras different from lizards?
b) How do crocodiles and alligators differ from each other?
c) Where was the Archaeopteryx discovered? Give reasons for the Archaeopteryx being considered the connecting link between reptiles and birds.

10. a) List and give one function of the four glands of the integument of mammals.
b) Give two distinguishing morphological features of each of the following orders:
i) Cingulata
ii) Sirenia
iii) Primate

Wrapped Up

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