In each of the following, state two features that show how the named structure is adapted to carry out the named function - Leaving Cert Biology - Question 14(c) - 2017
Question 14(c)
In each of the following, state two features that show how the named structure is adapted to carry out the named function.
(i) The lens of the eye for focusing ligh... show full transcript
Worked Solution & Example Answer:In each of the following, state two features that show how the named structure is adapted to carry out the named function - Leaving Cert Biology - Question 14(c) - 2017
Step 1
(i) The lens of the eye for focusing light.
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Answer
The lens is transparent, allowing light to pass through without obstruction.
It is curved and can change its curvature (shape) to focus light correctly on the retina.
Step 2
(ii) A neuron for transmitting impulses.
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Neurons have insulated regions (myelin sheath) that increase the speed of impulse transmission.
They contain dendrites that receive signals and an axon that transmits impulses to other neurons.
Step 3
(iii) An intestinal villus for absorbing soluble food.
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Villi have a wall that is only one cell thick, facilitating rapid absorption of nutrients.
They possess a large surface area due to their finger-like projections, maximizing absorption efficiency.
Step 4
(iv) A glomerulus for filtering blood.
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The glomerulus consists of capillaries that allow high (blood) pressure, aiding in filtration.
It has a wall that is one cell thick, which enhances the filtration process.
Step 5
(v) A wind-pollinated flower for pollination.
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Wind-pollinated flowers usually have small or absent petals, reducing weight and drag.
They produce vast amounts of pollen, which increases the chances of successful pollination by the wind.
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