Question

Please answer these questions​

Answer 1

» Given Questions :

• Give two examples of Kharif and Rabi crop.

• What are Preservatives?

• Expand PET. Where is it used?

• What are the uses of Coke?

• Differentiate Prokaryotes and Eukaryotes.

» Required Answers :

Ans ( 1. ) Two examples of Kharif crops are :

✰ Paddy

✰ Maize

✰ Cotton

✰ Maize

✰ Soyabean and so on.

Two examples of Rabi crops are :

✰ Gram

✰ Peas

✰ Wheat

✰ Mustard and so on.

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Ans. ( 2 )

The chemicals that are use to preserve the food for long time are called food preservatives.

Examples-

» Salt

» Sugar

» Sodium benzoate etc.

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Ans. ( 3 )

PET stands for polyethylene terephthalate.

It is used for making bottles, utensils, films, wires and many useful products.

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Ans. ( 4 )

Uses of coke are-

• Coke is used as a fuel.

• Coke is used in the manufacture of steel and extraction of other metals.

• Coke is used to manufacture artificial graphite.

• It is also used to make certain fuel gases like water gas.

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Ans. ( 5 )

✰ Prokaryotes : Prokaryotes don't have well organised nucleus. It doesn't show the presence of a nuclear membrane, or any other membrane bound organelles.

They don't have distinct genetic material.

✰ Eukaryotes : Eukaryote have well organised nucleus. It shows the presence of a nuclear membrane, or any other membrane bound organelles.

They have distinct genetic material.

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Answer 2

Answer:

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$\huge\fbox\pink{Question-1}$

Give two examples of Kharif and Rabi crop.

$\huge\fbox\red{Answer:-}$

• Kharif crops- Paddy and Maize
• Rabi crops- Wheat and Gram

$\huge\fbox\green{Question-2}$

What are preservatives?

$\huge\fbox\blue{Answer:-}$

The chemical substances which are used to check or stop the growth of harmful micro-organisms in food and prevent the spoiling of food are called food preservatives .

$\huge\fbox\purple{Question-3$

Expand PET. Where it is used?

$\huge\fbox\red{Answer:-}$

PET - Poly ethylene Terepthalate.

It is used in the manufacture of containers for microwave cooking and bottles of carbonated beverages.

$\huge\fbox\pink{Question-4}$

What is the uses of coke?

$\huge\fbox\blue{Answer:-}$

Uses:

• Coke is used in the manufacture of steel and in the extraction of many metals.
• It is used as a fuel.

$\huge\fbox\green{Question-5}$

Differentiate Prokaryotes and Eukaryotes.

$\huge\fbox\red{Answer:-}$

1. Eukaryotic cells contains membrane bounded organelles, such as the nucleus, while prokaryotic cells do not.

2. Prokaryotes are also known as the primitive life forms as they arrived earlier than the eukaryotes during the course of evolution.

3. Eukaryotes are multicellular and prokaryotes are unicellular.

4. Ribosomes are smaller in prokaryotes and larger in eukaryotes.

5. Prokaryotes lacks 'true nucleus', whereas eukaryotes possess nucleus as well as nuclear membrane.

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