Question
Study the diagram below and answer the questions that follow.
(a) Name the parts labelled.
(i) Y
(ii) Z
(iii) X
(b) State an adaptation of each part labelled Y and Z in the diagram.
(a) Name the parts labelled.
(i) Y
(ii) Z
(iii) X
(b) State an adaptation of each part labelled Y and Z in the diagram.
Answer
a)
i) Y - Gill raker (reject rakers)
ii) Z - Gill bar
iii) X - Gill filament (reject filaments)
b)
Y - Gill raker - teeth like structures to prevent solid materials present in water from reaching the delicate gill filaments
Z - Bill bar - long, curved, bony to provide large surface area for attachment of gill filaments and rakers
i) Y - Gill raker (reject rakers)
ii) Z - Gill bar
iii) X - Gill filament (reject filaments)
b)
Y - Gill raker - teeth like structures to prevent solid materials present in water from reaching the delicate gill filaments
Z - Bill bar - long, curved, bony to provide large surface area for attachment of gill filaments and rakers
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