Rhizopus is a harmful heterotrophic fungus - Leaving Cert Biology - Question c - 2020
Question c
Rhizopus is a harmful heterotrophic fungus.
(i) Where would you find Rhizopus?
(ii) What is meant by the term heterotrophic?
(iii) Draw a diagram to show the stru... show full transcript
Worked Solution & Example Answer:Rhizopus is a harmful heterotrophic fungus - Leaving Cert Biology - Question c - 2020
Step 1
Where would you find Rhizopus?
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Answer
Rhizopus can commonly be found on decaying organic matter such as bread, fruits, and vegetables. It often grows in damp, warm environments that facilitate its growth.
Step 2
What is meant by the term heterotrophic?
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Answer
The term heterotrophic refers to organisms that cannot produce their own food. Instead, they obtain nourishment by consuming organic substances, such as other organisms or their remains.
Step 3
Draw a diagram to show the structure of Rhizopus. On your diagram include the following labels: rhizoids, sporangiophores and sporangium.
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To illustrate Rhizopus, draw a simple diagram showing its structure:
Rhizoids: These are root-like structures that anchor the fungus to its substrate.
Sporangiophores: These are the stalks that support the sporangium, where spores are produced.
Sporangium: This is the sac-like structure at the tip of the sporangiophore that contains the spores.
Make sure to label each part clearly in your diagram.
Step 4
Label M on your diagram where mitosis occurs.
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Answer
Label 'M' on your diagram at the sporangium where mitosis occurs, as this is the site of spore formation, and it undergoes mitosis to create new spores.
Step 5
Which form of reproduction results in the formation of a zygospore?
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The sexual form of reproduction results in the formation of a zygospore. This occurs when compatible hyphae from two different mating types fuse together.
Step 6
Name another harmful fungus.
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An example of another harmful fungus is Athlete's foot, which is a common fungal infection affecting the feet.
Step 7
Name a beneficial fungus and give an example of its economic importance.
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A beneficial fungus is the edible mushroom. An example of its economic importance is its use in the food industry, providing nutrition and flavor to various dishes.
Step 8
What can be used to treat fungal infections but is of no use against viral infections?
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Antibiotics can be used to treat fungal infections; however, they are ineffective against viral infections.
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