1.Where do plants get each of the raw materials required for photosynthesis?
2.What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
3.“If there were no algae there would be no fish in the sea”. Comment.
4.Write the role of saliva in the buccal cavity.
5.Write the functions of: (a) HCL (b) Mucus (c) Pepsin
6.Enumerate the enzymes secreted by pancreas and their role.
7.How are lungs designed to maximize the exchange of gases?
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