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Please tell what is pheromones

Posted by Kalpana Mahato 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 4 months ago

A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to impact the behavior of the receiving individuals.

ANSWER

What is fermentation with examples?

Posted by Aditya Raj 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Sia ? 4 years, 4 months ago

Fermentation is a metabolic process in which an organism converts a carbohydrate, such as starch or a sugar, into an alcohol or an acid. For example, yeast performs fermentation to obtain energy by converting sugar into alcohol. Bacteria perform fermentation, converting carbohydrates into lactic acid. The study of fermentation is called zymology.

Hansika Chawla 4 years, 4 months ago

The process of conversion of sugar into alcohol is called fermentation

Aspirant Aspirant 4 years, 4 months ago

The process of conversion of sugar into alcohol is called fermentation.

Nikita And Pratik 4 years, 4 months ago

The process of converting sugar into alcohol is called fermentation. Ex. When we add yeats to the dough of idli or dosa and leave it for over night the yeast breath anaerobically and produce alcohol so that in the morning the dough 's volume will increase and ready to cook.

Vizzy Viz 4 years, 4 months ago

The process of converting sugar into alcohol is called fermentation. It was discovered by Louise Pasteur in 1857

ANSWER

What is a crop name two types of crops give two example

Posted by Rohit Chanda 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Aspirant Aspirant 4 years, 4 months ago

Same kind of plants grows on a large scale is called crop. Types of crops: (i) Kharif crop (ii) Rabi crop Examples : * Kharif crop - Paddy and maize etc. * Rabi crop - wheat and gram etc.

Roma Gujjar 4 years, 4 months ago

When the same kind of plant grown in large scale is called crop example wheat. rice

Shivansh Dev 4 years, 4 months ago

Kharif crops and Rabi Crops

Vizzy Viz 4 years, 4 months ago

When the plants of the same kind are grown on a large scale it is called a crop. There are 2 types of crops:- Kharif crops and rabi crops Kharif crops- paddy, maize Rabi crops-wheat, gram

Sia ? 4 years, 4 months ago

Kharif Crops	Rabi Crops
Sowing of seeds begins in the rainy season around July	Rabi seeds are sown at the beginning of autumn in November or December
Harvesting is done in September – October	Harvesting happens in June – July
Examples: Rice, Maize, Bajra etc	Examples: Wheat, Mustard, Peas etc

ANSWER

Why should plastics should not be banned

Posted by Aishwarya Pj 4 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Aspirant Aspirant 4 years, 4 months ago

Plastics are not friendly with nature and they harm are nature.

Roma Gujjar 4 years, 4 months ago

Because it is the largest using material in the world

Vizzy Viz 4 years, 4 months ago

We know that plastics are boon for us but misusing them makes it a curse for us. So,if we will wisely use them then there will be no curse of it.

ANSWER

What is mean bu asexual production

Posted by Trisha Muttamshetty 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Aditya Raj 4 years, 4 months ago

An individual can reproduce on its own without the involvement of another individual of same spices.

ANSWER

What are the 10 OMG things about India

Posted by Binal Shah 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 4 months ago

A floating post office.
Kumbh Mela gathering visible from space.
The wettest inhabited place in the world.
Bandra Worli Sealink has steel wires equal to the earth's circumference.
The highest cricket ground in the world.
Shampooing is an Indian concept.
The Indian national Kabaddi team has won all World Cups.
Water on the moon was discovered by India.
Science day in Switzerland is dedicated to Ex-Indian President, APJ Abdul Kalam.
India's first President only took 50% of his salary

ANSWER

A machine which is combined harvester and threshet

Posted by Ankit Gulia 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Archisha Mishra 4 years, 3 months ago

It's a combine.

Aspirant Aspirant 4 years, 4 months ago

Combine

Roma Gujjar 4 years, 4 months ago

Combiner

Nikita And Pratik 4 years, 4 months ago

Combine

Vizzy Viz 4 years, 4 months ago

Combine

ANSWER

Large scale rearing of honeybees

Posted by Ankit Gulia 4 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Roma Gujjar 4 years, 4 months ago

Apiculture

Vizzy Viz 4 years, 4 months ago

Apiculture

Harpreet Singh Harpreet Singh 4 years, 4 months ago

Apiculture

Trisha Muttamshetty 4 years, 4 months ago

A large sale of raering honeybees is called apriculture

ANSWER

2. Voice of which of the following is likely to have minimum frequency? (a) Baby girl (b) Baby boy (c) A man (d) A woman

Posted by Namrata Gupta 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Trisha Muttamshetty 4 years, 4 months ago

Baby girl

Namrata Gupta 4 years, 4 months ago

The answer should be a man but in this it is given a baby girl so what is the correct answer?

Vanshpreet Kaur 4 years, 4 months ago

Baby girl

Zviane Synnah 4 years, 4 months ago

A baby girl

Kruti Patel 4 years, 4 months ago

A man

ANSWER

Loosening and turning of soil

Posted by Ankit Gulia 4 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Vizzy Viz 4 years, 4 months ago

The process of loosening and turning the soil is called PLOUGHING. It is also known as tilling

Aditya Raj 4 years, 4 months ago

The loosening or turning of soil is known as weathering.

Namrata Gupta 4 years, 4 months ago

The process of loosening and turning the soil is called ploughing (tilling).

ANSWER

Large scale rearing of fish

Posted by Ankit Gulia 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Harpreet Singh Harpreet Singh 4 years, 4 months ago

Pisiculture

Zviane Synnah 4 years, 4 months ago

Large scale of rearing a fish is called pisciculture

ANSWER

If the area of cross section of a current carrying wire become twice then what will it be specific resistance?

Posted by Swagat Mishra 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Namrata Gupta 4 years, 4 months ago

As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant. Hence, we can see that the new resistance is four times the previous resistance.

ANSWER

Un wanted plants grown along with crope

Posted by Ankit Gulia 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Samriddhi Agarwal 4 years, 4 months ago

Weed are the unwanted plants that grow along the crops .. Which should be removed as it affects the growth of the plants..

Jasmi Makker 4 years, 4 months ago

weeds thank u

Ankit Gulia 4 years, 4 months ago

Large scale rearing of fish

Swagat Mishra 4 years, 4 months ago

Weeds are the unwanted plants that grow along with crop..

Shlok Katkar 4 years, 4 months ago

Weeds

ANSWER

Keeping crop grain for a long time under proper conditions

Posted by Shreyansh Rai 4 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Aspirant Aspirant 4 years, 4 months ago

Storage of crops.

Roma Gujjar 4 years, 4 months ago

Storage

Nikita And Pratik 4 years, 4 months ago

Is known as storage

ANSWER

Define polymer. What is the need for making polymer

Posted by Op Rohit 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Vizzy Viz 4 years, 4 months ago

Polymer is a Greek word which means many parts/units. When monomers are joined together they are called polymer. We need polymer bcs it helps in making synthetic fibres

Tarang Agarwal 4 years, 4 months ago

That's very easy

ANSWER

What is mean by antibody

Posted by Sriya S 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Harshita Dogra 4 years, 2 months ago

An antibody is a protein that develops in the body as a normal course of the immune response to various types of infections.

Trisha Muttamshetty 4 years, 4 months ago

Antibody is known as Immunoglobulin

ANSWER

How many bone in a animals

Posted by Satyam Shubham Mishra 4 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Sia ? 4 years, 4 months ago

“They form the structure of the body.” Humans have 206 bones, while the average cat has about 244 bones. Sometimes, it's the number of bones and muscles that makes a difference in how an animal moves around. We cats, for example, have more bones in our spine than humans do.

Harshita Dogra 4 years, 2 months ago

“They form the structure of the body.” Humans have 206 bones, while the average cat has about 244 bones. Sometimes, it's the number of bones and muscles that makes a difference in how an animal moves around. We cats, for example, have more bones in our spine than humans do.

Ankit Gulia 4 years, 4 months ago

244

ANSWER

Define agriculture . List basic agricultural practices in correct order

Posted by Nupur Tayal 4 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Jasmi Makker 4 years, 4 months ago

basic agricultural activities are 1. preparing the soil 2. sowing the seeds 3. inproving soil fertility 4. irrigation 5. crop protection 6. harvesting 7. storage

Jasmi Makker 4 years, 4 months ago

The process or occupation concerned with cultivating land,breedig and rasing livestock is called agriculture

Vizzy Viz 4 years, 4 months ago

Agriculture is the art and science of cultivating the soil, growing crops and raising livestock. Different agricultural practices are:- 1.Preparation of soil 2. Sowing 3. Adding manure and fertilizers 4. Irrigation 5. Removing weeds 6. Harvesting 7. Storage

ANSWER

Give different steps involved in agriculture.

Posted by Deepak Kumar 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Vizzy Viz 4 years, 4 months ago

Agricultural practices:- 1. Preparation of soil 2. Sowing 3. Adding manure and fertilizers 4. Irrigation 5. Protecting from weeds 6. Harvesting 7. Storage

Nikita And Pratik 4 years, 4 months ago

Preparation of soil → sowing→adding manure and fertilizers→irrigation →protecting from weeds →harvesting →storage ..

ANSWER

Out of the following material: Cotton, nylon,terylene,wool,PET, acrylic 1.wich materials are polyster 2.which material is a polymide 3.which material is used as a substitute for wool 4.which material is used as a substitute for glass

Posted by Mishti Gusain 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Vizzy Viz 4 years, 4 months ago

Polyester- nylon Polymide- terylene Wool- acrylic Glass- polyethylene teraphthalate( PET)

ANSWER

K

Posted by Tseawang Lhamo 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Shital Tambe 4 years, 3 months ago

M

Arya Patil__ 4 years, 4 months ago

L

ANSWER

Who discovered wooden furniture?

Posted by Shreya Student8C 25-10-2008 4 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Anjali Yadav 4 years, 4 months ago

A

Anjali Yadav 4 years, 4 months ago

Archaeologist

Gargi Singh 4 years, 4 months ago

In Russia before 30,000 year ago

Gargi Singh 4 years, 4 months ago

Archaeologist

ANSWER

For discussion Despite being one of the growing economies, our country still has a large section of population going hungry and malnourished. Do you think an efficient crop production mechanism is the only solution to this? Discuss in the class what else needs to be done to root out hunger and malnutrition from our country.

Posted by Bongu Manogna 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 4 months ago

Agriculture is the main source of income in India since a long time. Even for many decades, India was an agrarian economy. Apart from that India has a large number of agricultural consumers. Due to very high population it becomes necessary for a country like India that it maintains the agriculture sector and works for its benefits. The following methods can be useful for India to make it a vast agrarian country and to reduce malnutrition-

For breeding and seeding, we should select s high quality seed. These crops will have faster growth and higher yield.
The management and collection of the crops should be done very carefully. As, many a times, the crops which are being stored in the go-downs may get spoiled.
The crop should be made available to everyone. The government should not discriminate between the rich and poor.
The information regarding better production of the crops and its care should be made available on multiple platforms such as television and radio. It can help farmers to understand variety of crops and its farming.

ANSWER

What is the full form of virus??

Posted by Khushnoor Rajpal 4 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Anjali Yadav 4 years, 4 months ago

Virtual information resources under siege

Mamta Sharma 4 years, 4 months ago

Vital Information Resources Under Siege is the full form of virus

Gargi Singh 4 years, 4 months ago

Full form of virus —Vital Information Resources Under Siege

Shreya Student8C 25-10-2008 4 years, 4 months ago

Vital information resources under seize

Naresh Vashnav 4 years, 4 months ago

Covid-19

ANSWER

Describe the role of nitrogen fixation in agriculture.

Posted by Madhu Singh 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Nikita And Pratik 4 years, 4 months ago

Nitrogen is found in abundance in the atmosphere . It is one of the most important nutrient required for plant growth. The atmospheric nitrogen is converted into usable form of nitrogen compound by nitrogen fixation . If the same crops are grown in the field for many years , the soil becomes poor in nutrients like nitrogen and fertility of the soil decreases. The soil can be replenished with nutrients by growing such a crop which is able to fix up the nitrogen like leguminous crop. Rhizobium bacteria present in the root nocludes of leguminous crops fixes atmospheric nitrogen , converts it into usable compound , hence increasing the fertility of the soil .

Mihir Raj 4 years, 4 months ago

Nitrogen fixation help help the plant to make Protein and his food.

ANSWER

Explain how fertilizers are different from Menu

Posted by Ankush Kumar 4 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Vizzy Viz 4 years, 4 months ago

Fertilizers- They are inorganic salts. They are produced in factories. They are very rich in nitrogen, phosphorus and potassium. They cause water pollution. They don't provide any humus to soil. Manure- These are made by decomposing the dead remains of plants and animals. It is prepared in fields. It provides alot of humus to soil. They donot causa pollution. They are less nutrient rich.

Nikita And Pratik 4 years, 4 months ago

The difference between manure and fertilizers Fertilizers It is an inorganic salt . It is made in factory . It provide particular nutrients to plants . It doesn't provide any humus to plant . It is very expensive. It pollutes the soil , water . Example : Ammonia, phosphorus, nitrogen, potassium etc. Manure It is organic substances made of decomposition of plant waste , animal waste. It is prepared in compost pits in the field. It improves the water holding capacity of soil . It improves the texture of soil . It provide lot of humus to plant . It is very cheap . It doesn't pollutes soil water etc .

ANSWER

Write a short paragraph on the harmful effects of microorganisms.

Posted by Bhavika Soni 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Vizzy Viz 4 years, 4 months ago

Microorganisms are harmful to us in many ways.  For example, microorganisms, called pathogens cause diseases in humans, plants and animals. Pathogens or germs enter a healthy body through air, water, contaminated food and infected person by direct or indirect contact or by the carrier and spread the diseases. Microorganisms that grow on our food sometimes produce toxic substances and make the food poisonous causing serious. Some Micro-organisms also spoil leather items and clothes.

ANSWER

Define carbonisation

Posted by Riddhi Vinayak Pandey 4 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Harshita Dogra 4 years, 2 months ago

Carbonisation :- The process of coversion of dead plants into coal.

Khushnoor Rajpal 4 years, 4 months ago

The process of conversion of dead plants materials into coal due to heat and pressure which got burried deep under the earth's crust over a large period of time.....thank u...

Rupam Das 4 years, 4 months ago

What are the major groups of microorganisms

Riddhi Vinayak Pandey 4 years, 4 months ago

The process of conversion of dead plants materials into coal due to heat and pressure which got burried deep under the earth's crust over a large period of time.

ANSWER

What Is Mass And What Is Weight

Posted by Saigopi Saigopi 4 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 4 months ago

It is one of the fundamental quantities in Physics and the most basic property of matter. We can define mass as the measure of the amount of matter in a body. The SI unit of mass is Kilogram (kg).
It is the measure of the force of gravity acting on a body.
The formula for weight is given by:
w = mg

ANSWER

hi solve 2000 + 3637737

Posted by Rudra Chetariya 4 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Harshita Dogra 4 years, 2 months ago

36,39,737

Shivansh Dev 4 years, 4 months ago

3639737

Mamta Sharma 4 years, 4 months ago

3,639,737 is the ans

Rudra Chetariya 4 years, 4 months ago

they win 1200 diamond in free fire

ANSWER

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