Questions for 18 July ZOOLOGY

Q:-1 What are the various modes of respiration in Arthropods. Explain the tracheal mode of respiration with suitable diagrams. (20)

Q:-2 What is mutagenesis? Give the name of various chemical mutagens, explain mechanism also. (15)

Q:-3 Discuss various types of chromosomal abbreviations. Explain their significance also. (15)

Q:-4 How mutation play an active role in Cancer? What is nonsense mutations, compare it with sense mutations. (15)

Q:-5 Comment on various types of mouth modification in insects, with suitable diagrams. (20) 

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Questions for 20 August Zoology

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Questions for 12 July 2018 Zoology

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Parasitic adaptation of Taenia

Taenia Parasitic adaptations Tapeworms live as internal parasites and they have to make several adjustments for the same. The following are few of the adaptations made by these tapeworms to make their life easy in their hosts. Presence of enzymatic resistant covering A hard covering called as tegument covers the body of these tape worms. Tegument is enzyme resistant and it protects all the internal organs from the digestive actions of the alkaline fluids of the host. On the other hand tegument is permeable to water and other nutrients. Absence of locomotory organelles This parasite lacks organs for locomotion. As there is no need for any locomotory organs both the adult and larval forms lack cilia or flagella. Osmotic pressure The osmotic pressure inside the body is higher than that of the surrounding host tissue or fluid. This helps the parasite to reside conveniently in the host body. Presence of hooks and suckers for attachment For the attachment purpose a scolex...
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