2 Answers

The part labelled II is the

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BIOLOGY

Use the diagram to answer the question that follow

The part labelled III acts as

The part labelled II is the…

A. arch

B. filament

C. slit

D. raker

QUICK ANSWER…

D

DETAILS…  

The above structure is that of a fish gill.

The part labelled I is called gill arch; its function is to offer support and frame on which the filaments and rakers are attached.

The part labelled II is called gill rakers; its function is to prevent escape of food through the slits, and damage to the gill.

And the part labelled III is called gill filaments; its function is to provide a good surface area where gases, water, acids, and ions are exchanged.

Now for the right answer to the above question:

  1. The arch is the part labelled I. So, A is incorrect.
  2. The filament is the part labelled III. B is also incorrect.
  3. The part labelled II is not the slit. So, C is incorrect.
  4. D is correct; the raker is labelled II.

QUICK ADVICE…

You may please note that:

  • The function of the raker is to prevent escape of food through the slits, and to prevent damages to the gill.

Use the questions and answers session to raise further questions and deal more on this topic…

/ culled from 2017 JAMB-UTME biology question 37 /

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