Question

can you have answer of this all question. ​

Answer 1

Answer:

Hope it will help you...

Answer 2

I) bit

1) What is the difference between plant and animal cell?

✰Plant Cell

• Cell wall is Present
• Chloroplast is Present
• It has no centrosome
• Vacuoles are larger or maybe single and large as in onion cell

✰Animal Cell

• Cell wall is absent
• Chloroplast is absent
• centrosome is Present
• Vacuoles are much smaller as check cells

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2) Explain the difference between cytoplasmic membrane, cytoplasm and nucleus.

✰cytoplasmic membrane

• The basic component of a cell are cell membrane or cytoplasmic membrane.
• The membrane seperates cells from one another and also the cell From the surrounding medium.
• The Membrane allows movement of substances.

✰cytoplasm

• It is jelly like substance Present between cell membrane and the nucleus.
• Various others components or organelles,of cells are Present in the cytoplasm.

✰Nucleus

• It is spherical and located in centre of the cell.
• It is seperated from the cytoplasm by a membrane called nuclear membrane.
• Nucleus contains thread like structures called chromosomes.
• These carry genes and help in inheritance.
• It is a control cell.

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II) Bit

1) Which fuel would you select from Petrol, Diesel and Natural gas? Why?

If I had a chance to select a fuel,I would choose Natural Gas

Why ?

• Natural gas is a very important fossil fuel because it is easy to transport through pipes.
• Natural gas is stored under high pressure as Compressed Natural Gas (CNG).
• CNG is a fuel for transport vehicles because it is less polluting. and cleaner fuel.

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2) Which points you will keep in mind to control fire?

• Keep away towels, bedsheets, clothes etc from fire.
• Never wear polyster clothes while working in the kitchen it can caught fire.
• Keep away candles, matchsticks and other fire applicants away from children.
• Clean cooking surfaces on a regular basis to prevent grease buildup.
• Always check the kitchen before leaving or going out.
• Always keep an extinguisher.

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III) bit. Give scientific Reasons

1. Biosphere reserve is a boon for plant and animals.

• Biosphere Reserves are meant for conservation of biodiversity.
• It is boon for plants and animals because it protects the animals from hunting, poaching.it protects the plants and trees from getting cut, cultivation, grazing are prohibited here.
• The animals can live peacefully.
• Many endangered species are protected so their Species can grow again.

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2) Deserts are formed due to deforestation.

• Deforestation Refers to cutting and clearance of forests.
• A forest can be a dessert if all the trees are cut down.
• Due to no trees, There is no rainfall.

✰Few reasons why deforestation is increasing

• Procuring land for cultivation.
• Building Houses and factories.
• Over grazing.
• Forests fire etc.

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3. Migratory birds leave their place at particular other places.

• Migratory birds fly to far away areas every year during a particular time because of climatic changes.
• They fly for laying eggs as the weather in their natural habitat becomes cold and inhospitable.
• They fly to find food for through the year.

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IV)

1. Explain the three types of combustion

• The gas burns rapidly and produces heat and light. such a combustion is known as ❛rapid combustion❜.
• A material Which suddenly bursts into flames, without application of any apparent cause is called ❛spontaneous combustion❜.
• A large amount of gas formed in the reaction is liberated.such reaction is called ❛explosion or explotive combustion❜.

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2. Which one of a flame does a goldsmith use to make omaments? Why?

Goldsmith blow outermost zone know as luminous zone of a flame with a metallic blow-pipe for melting gold and silver.

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