The diagram below shows part of the mycelium of the fungus Rhizopus - Leaving Cert Biology - Question c - 2011
Question c
The diagram below shows part of the mycelium of the fungus Rhizopus.
(i) Give the name and state a function of the part labelled A.
(ii) Name part B and explain why... show full transcript
Worked Solution & Example Answer:The diagram below shows part of the mycelium of the fungus Rhizopus - Leaving Cert Biology - Question c - 2011
Step 1
Give the name and state a function of the part labelled A.
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Answer
A = rhizoids.
Function = Rhizoids are involved in the digestion and secretion processes, assisting in the absorption of nutrients from the substrate, or they serve as anchorage to support the fungus.
Step 2
Name part B and explain why the reproduction associated with it is asexual.
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B = sporangium.
Reproduction is asexual because the spores all develop from a single parent without the involvement of gametes.
Step 3
What does the term saprophytic mean?
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Saprophytic means feeding on dead matter. It involves the breakdown of dead or decaying organic material, effectively recycling nutrients back into the ecosystem.
Step 4
Explain the importance of saprophytic nutrition in the overall scheme of nature.
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Saprophytic nutrition plays a crucial role in ecosystems by recycling nutrients, which supports the growth of new plant life. By breaking down complex organic materials, saprophytic fungi and bacteria contribute to soil fertility, allowing for a continuous cycle of life.
Step 5
What does the term heterotrophic mean?
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Heterotrophic refers to organisms that obtain food from other organisms or organic sources, instead of producing their own food through photosynthesis or chemosynthesis.
Step 6
Name another form of nutrition employed by some fungi.
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Parasitic nutrition, where fungi obtain nutrients from living hosts, often harming them in the process.
Step 7
Give two examples of harmful members of the kingdom Fungi.
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Aspergillus - this genus can cause respiratory issues in humans.
Candida - this yeast can lead to infections in immunocompromised individuals.
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