Question for 02 August zoology

Q:-1 What is continental drift? Explain how it played role in distribution of fauna? (15)
Q:-2 What is succession? Compare the primary and secondary succession. With suitable examples explain aquatic succession. (20)
Q:-3 Describe the term heat island. How anthropogenic factors contributing to it? Discuss its implications on biodiversity. (20)
Q:-4 Describe the nitrogen cycle. How anthropogenic activities altering it? (10)
Q:-5 Define ecotone. Discuss diversity at ecotone. Are sacred grooves ecotone? Discuss. (10)

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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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