1. In which of the following characters do plasmodial slime moulds and cellular
ID: 207168 • Letter: 1
Question
1. In which of the following characters do plasmodial slime moulds and cellular slime moulds differ?
a. size
b. Only plasmodial slime moulds have macronuclei.
c. Only cellular slime moulds form fruiting bodies.
d. The nuclei of plasmodial slime moulds are not separated by cell walls.
e. all of the above
2. Which of the following is correct about lichens?
a. They may contain prokaryotes.
b. They are partly plants or plant roots.
c. They are partly zygomycetes.
d. Most of them are parasitic.
e. none of the above
3. Hyphae are characteristic of
a. Ascomycota.
b. Basidiomycota.
c. Zygomycota.
d. Glomeromycota.
e. all of the above
4. If plasmogamy is immediately followed by karyogamy, the result is a
a. haploid mycelium.
b. diploid mycelium.
c. dikaryotic mycelium.
d. non-septate mycelium.
e. fruiting body.
Explanation / Answer
1. d. The nuclei of plasmodial slime moulds are not separated by cell walls.
The plasmodial and cellular slime molds both produce fruiting bodies under appropriate conditions, however the major difference between cellular slime molds and plasmodial slime molds is the fact that each cellular slime mold nucleus is surrounded by cell wall. In case of the plsmodial slime molds, there is formation of a multinucleate mass known as plasmodium.
2. a They may contain prokaryotes.
Lichens are formed by association between fungal partner (mycobiont) and algal partner (phycobiont). However, sometimes another partner in the form of cyanobacteria are also found in the lichens. Cyanobacteria are prokaryotic photosynthetic microbes many of which also have nitrogen fixing caoability.
3. e. all of the above
Members of all the enlisted groups i.e. ascomycota, zygomycota, basidiomycota and glomeromycota possess hyphae. Hyphae refers to the cottony filaments which make up the fungal thallus. While ascomycota and basidiomycota possess septate hyphae, the zygomycota and glomeromycota possess aseptate hyphae.
4. a. haploid mycelium.
Plasmogamy refers to fusion of cytoplasm while karyogamy refers to fusion of nuclei. During karyogamy, the haploid (n) nuclei fuse resulting into a diploid cell (2n). Mostly, this is followed quickly by meiosis which re-establishes the haploidy. The mycelia arising from such cells will be haploid.
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