7- a. Draw two functional diagrams, the first illustrates the path of air
between the balloon and the human
organism, and the second the sense
of the circulation of the coloured
liquid in the fish
b Give a title to every diariram

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

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