Tag: interdependence between plants and animals
Questions Related to interdependence between plants and animals
Mycorrhiza is a symbiotic associated of fungus with root system which helps in
A. absorption of water
B. mineral nutrition
C. translocation
D. gaseous exchange.
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Only A
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Only B
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Both A and B
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Both B and C
Litmus is obtained from
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Lichen
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Algae
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Fungi
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Protozoa
Litmus, was formerly prepared only in Holland, but at present is manufactured from various lichens in Italy, France and Britain. A peculiar blue coloring matter obtained from Roccella tinctoria, Acharius, and other lichens. Roccella tinctoria, or Orchilla weed, is a small, dry lichen, with a rounded, glaucous, nearly erect thallus, forked and subdivided into numerous branchy, roundish, gray, yellowish, or brownish threads; the apothecia are scattered, red and elevated; the disks are flat, caesius, pruinose, and as broad as the border.
Indicator plants which can be used to indicate atmospheric pollution by $SO _2$ are
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Lichens like Usnea
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Grassland like Deschampsia
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Moss like Sphagnum
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Climbers like Cucurbita
Sulphur dioxide is produced during combustion of fossil fuels, refining of petroleum and smelting of sulphur containing ores. Sulphur dioxide produces smog and acid rain. Sulphur dioxide causes membrane damage, destruction of chlorophyll, necrosis and water soaked appearance. Lichens are the most sensitive organisms to sulphur dioxide pollution and do not grow in areas with high levels of sulphur dioxides. Hence Lichens like Usnea are used as indicators of level of sulphur dioxide pollution.
A location with luxuriant growth of lichens on the trees indicated that the :
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Trees are heavily infested.
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Location is highly polluted.
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Location is not polluted.
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Trees are very healthy.
Lichens are sensitive to air pollution and hence they are absent in polluted areas. An extensive grwth of lichens indicate that the location is unpolluted.
Pick up the wrong statement :
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Lichens are symbiotic association.
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Lichens are very good pollution indicators.
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Lichens do not grow in unpolluted areas.
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The algal component of lichen is known as phycobiont.
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The fungal component of lichen is known as mycobiot.
Lichens are very sensitive to sulphur dioxide pollution in the air and hence they don't grow in polluted areas. They are found in unpolluted areas.
Lichens are described as indicators of :
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Soil pollution
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Air pollution
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Water pollution
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Agricultural productivity
Litmus is got naturally from
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Algae
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Fungi
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Lichens
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Protozoans.
Litmus is got naturally from different species of Lichens. It is used as pH indicator to check the acidity of a material.
In perfumery, the lichen species used are
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Caledonia
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Evermia
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Snead
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Parmelia
In perfumery, two species of lichen are used, namely Evernia prunastri and Pseudevernia furfuracea. These are commonly called as oakmoss and treemoss respectively. Evernia prunastri is found on oak trees.
Intraspecific competition is strongest when the
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Reproductive rate is at its maximum
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Populations overlap in their ranges
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Species overlap in their distribution
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Population is at its carrying capacity
Competition present between the members of the same species compete for limited resources is called Intraspecific competitions. Intraspecific competition is affected not only by the type of competition but also by the type of resource. .
Air quality indicator is
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Lichen
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Moss
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Algae
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None of the above
Lichens are mutualistic associations of a fungus and an alga or cyanobacterium and occur as crusty patches or bushy growths on trees, rocks and bare ground.