Austin Study Centre : 11th botany Chapter1

6. Differentiate Homoiomerous and Heteromerous lichens.

Homoiomerous	Heteromerous
Algae cells are evenly distributed in the thallus	A distinct layer of algae and fungi present in the thallus

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7. Write the distinguishing features of Monera.

1. Prokaryotic
2. Mostly Unicellular, rarely multicellular
3. Cell wall Present (made up of Peptidoglycan and Mucopeptides)
4. Autotrophic (Phototrophic, Chemoautotrophic) Heterotrophic (parasitic and saprophytic)
5. Motile or non-motile
6Examples are.Archaebacteria,Eubacteria,Cyanobacteria,Actinomycetes and Mycoplasma

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8. Why do farmers plant leguminous crops in crop rotations/mixed cropping?

1.Rhizobium, Clostridium, Azotobacter are Nitrogen fixing bacterias.
2.Living in the root nodules of leguminous plants has symbiotic association with fix atmospheric nitrogen and convert it into nitrates, thereby increase the fertility of the soil

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9. Briefly discuss on five Kingdom classification. Add a note on merits and demerits

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10. Give a general account on lichens

1. The symbiotic association between algae and fungi is called lichens.
2. The algal partner is called phycobiont, and the fungal partner is called mycobiont.
3. Algae provide nutrition for fungal partner and fix the thallus to the substratum through rhizinae.
4. Asexual reproduction takes place through fragmentation, soredia and isidia. Phycobionts reproduce by akinetes, aplanospore etc.,
5. Mycobionts produce ascocarps during sexual reproduction

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11. Explain the asexual reproduction in Rhizopus