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 c - 2017
Question 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 c - 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.
Its curved shape can change, enabling it to adjust focus for near or far objects.
Step 2
A neuron for transmitting impulses.
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Answer
Neurons have insulated axons (myelin sheath) that speed up the transmission of electrical impulses.
They possess dendrites that receive signals from other neurons, allowing for communication within the nervous system.
Step 3
An intestinal villus for absorbing soluble food.
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Answer
The villi have a large surface area due to their microvilli, which enhances nutrient absorption.
They are one cell thick, facilitating efficient transfer of nutrients into the bloodstream.
Step 4
A glomerulus for filtering blood.
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Answer
The glomerulus consists of a network of capillaries that increases filtration efficiency.
It is one cell thick, which allows for the quick exchange of substances between the blood and the filtrate.
Step 5
A wind-pollinated flower for pollination.
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Answer
These flowers usually have small or absent petals, reducing energy expenditure on attracting pollinators.
They produce vast amounts of lightweight pollen, which can be easily carried by the wind, enhancing the chances of pollination.
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