Pls the objectives
Biology- Obj
1 BDDCCBCDBC
11ADCDCCAACC
21 CAABBBBCBC
31 CABCCACDAA
41 ABBDDADDAB
Biology- Ans
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6ai )
Chemosynthesis is the biological conversion of one or more carbon- containing
molecules ( usually carbon dioxide or methane ) and nutrients into organic matter
using the oxidation of inorganic compounds ( e .g. , hydrogen gas , hydrogen
sulfide) or methane as a source of energy , rather than sunlight
6aii)
i ) Bacteria
ii) methanogenic archaea
6b)
Nitrogen — 78 percent.
Oxygen — 21 percent .
Argon — 0. 93 percent.
Carbon dioxide — 0.04 percent.
6c )
i ) They are composed of relatively few species of plants
ii) The salt level of the habitat is high
iii ) High flooding rate
iv ) extreme temperature and salinity fluctuations .
6cii )
Roots of salt marsh plants help stabilize the sandy substrate and trap and hold
nutrients and detritus that flow through with each tidal cycle. This detritus trap
helps feed bacteria , algae, and invertebrates . These root tangles also provide
critical refuge for small fish and other animals.
6d)
i ) Pulmonary Tuberculosis
ii) Cholera
iii ) Pertussis
iv ) Salmonellosis :
6dii)
i ) food poisoning
ii) food spoilage
iii ) Low market value of food
6e )
the person need plenty of rest and diet rich in protein, fruits an vegetables and
take plenty water
6f )
Tabulate
Tillage
i ) the soil is prepared mammally or mechanically
ii) conserves soil nutrients
iii ) good for farm practise
Bush Burning
i ) fire is used to remove plants
ii) destroyes soil nutrients
iii ) a bad farm practise
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3ai )
renewable resource is a resourcewhich can be used repeatedly and replaced
naturally.
3aii)
nonrenewable resource is a resource of economic value that cannot be readily
replaced by natural means on a level equal to its consumption .
3bi )
i ) oxygen
ii) fresh water
3bii)
I ) oil
ii) natural gas
3c )
i ) Regulated and Planned Cutting of Trees.
ii) Control over Forest Fire.
iii ) Reforestation and Afforestation.
v) Check over Forest Clearance for Agricultural and Habitation Purposes.
iv ) Proper Utilisation of Forest and Forests Products .
3d)
i ) increases soil nutrients
ii) increases soil air
iii ) improve soil structure
iv ) does not corrupt the soil
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2a)
i ) carbon dioxide
ii) Nitrogen
2b)
i ) CO 2 is used by plants to photosynthesize carbohydrates.
ii) Nitrogen is a major component of chhlorophyll
2ci)
Variegated leaf is a leaf that has green parts ( where the cells contain
chlorophyll) and non green parts ( where there is no chlorophyll) .
2cii )
The green parts
2ciii)
i ) The parts without chlorophyll do not photosynthesise
ii) the cells contain chlorophyll
2civ )
Magnesium
2d)
Fill The Table
Tabulate
i ) Halozoic - Human , venus fly trap
ii) parasitic - tape worm, Venus fly trap
iii ) symbiotic - lichen
iv ) sapraphytic- Rhizopus ,mushroom , housefly
v) autotrophic- spirogyra , water leaf plant, elephant grass
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Completed