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Draw a labelled diagram to show the structure of Rhizopus - Leaving Cert Biology - Question c - 2004
Question c
Draw a labelled diagram to show the structure of Rhizopus. State one feature in your diagram that indicates that Rhizopus belongs to the kingdom Fungi. Sexual repro... show full transcript
Worked Solution & Example Answer:Draw a labelled diagram to show the structure of Rhizopus - Leaving Cert Biology - Question c - 2004
Step 1
Draw a labelled diagram to show the structure of Rhizopus. State one feature in your diagram that indicates that Rhizopus belongs to the kingdom Fungi.
Answer
To illustrate the structure of Rhizopus, draw a diagram that includes the following labelled parts:
- Hyphae: These are the filamentous structures that make up the body of the fungus.
- Sporangium: The structure responsible for producing spores.
- Rhizoids: The root-like structures that anchor the fungus to the substrate.
A distinguishing feature indicating that Rhizopus belongs to the kingdom Fungi is the presence of hyphae or mycelium, which are characteristic of fungal organisms.
Step 2
Sexual reproduction in Rhizopus leads to the formation of a zygospore. Show, by means of labelled diagrams, the stages involved in the production of the zygospore.
Answer
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Fusion of Gametangia: Two compatible hyphae come together, and their gametangia fuse.
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Formation of Zygospore: After fertilization, a zygospore forms, which is a thick-walled structure that can withstand harsh conditions.
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Maturation of Zygospore: The zygospore undergoes maturation before germination, getting ready to produce new spores.
Step 3
Explain what happens when the zygospore reaches a location at which conditions for its germination are suitable.
Answer
When the zygospore reaches a favorable environment:
- Meiosis occurs within the zygospore, leading to the production of haploid spores.
- The hypha begins to grow, establishing the next generation of the fungus.
- The sporangium then releases the formed spores, which are capable of germinating into new hyphae and starting the life cycle over again.