1. A) name the 6 pairs of appendages in the prosoma of the class arachnida
B) which external structure is absent in chelicerata but is present in all other arthropods?
c) Mention the morphological difference between larval and adult tick.
2. a) name 2 cow muscles that are predilection sites of cysts of Taenia saginata
b) explain 2 ways by which humans get infected by hydatid cysts of Echinococcus granulosus
c) mention 3 ways of controlling E. granulosus13. a) explain 4 developmental patterns that occur in insects.
b) by which organs do insects perform the following function?
i) excretion
ii) respiration
4. Discuss 5 factors that have made insects the most successful members of the animal kingdom.
5. a) explain the function of the mantle in the molluscs.
b) mention 4 ways by which mollusks harm or benefit mankind.
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