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 - 2017
Question 14
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 light... 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 - 2017
Step 1
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, which enables it to change shape to focus light properly onto the retina.
Step 2
A neuron for transmitting impulses.
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Answer
Neurons have myelinated axons that increase the speed of electrical impulses.
They possess dendrites that receive signals from other neurons, facilitating communication.
Step 3
An intestinal villus for absorbing soluble food.
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Answer
Villi are one cell thick, which minimizes the distance for nutrient absorption.
They have a large surface area, which increases the efficiency of absorption of soluble nutrients.
Step 4
A glomerulus for filtering blood.
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Answer
The glomerulus consists of capillaries, which provide a vast surface area for filtration.
It operates under high blood pressure, facilitating the filtration of waste and excess substances.
Step 5
A wind-pollinated flower for pollination.
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Answer
Wind-pollinated flowers often have small or absent petals, which makes them less conspicuous to reduce energy expenditure on attracting pollinators.
They produce a large amount of smooth pollen, which can easily be carried by the wind.
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