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What is crop productions
  • 1 answers

Nitin Keshari 6 hours ago

Crop production is process
What are the two mehods of sowing seeds
  • 1 answers

Muskan Gupta 21 hours ago

.traditional tool .seed drill
Is Virus considered as the 5th major group of microorganisms ?
  • 1 answers

Yogita Ingle 1 day ago

There are following four major groups of microorganisms:
(i)   Bacteria
(ii)   Fungi
(iii)   Protozoa
(iv) Algae.
In addition viruses are also considered as fifth group of microorganisms.

Compare between threshing and winnowing
  • 1 answers

Yogita Ingle 1 day ago

  • Winnowing is the process of separating grains from chaff.
  • Threshing is the process of loosening edible part of grain from husk and straw to which it is attached.
Which gas gives green house effect
  • 2 answers

Yogita Ingle 1 day, 2 hours ago

The major gas that contributes to absorption of heat is carbon dioxide. Other greenhouse gases are methane, nitrous oxides, CFCs, and ozone.

Mukul Chaudhary 1 day, 3 hours ago

Carbon dioxide
Give 2 examples which indicate that nylon fires are stronger than cotton Fibre
  • 2 answers

Shreya Sarangi 1 day, 10 hours ago

Agriculture is the science and art of cultivating plants and livestock. Agriculture contains different types of agricultural practices like- preparation of soil, sowing , adding manure and fertilizer etc

Dilshad Khan 1 day, 12 hours ago

Define agriculture
Q1 What is weeds Q2 What are weeds
  • 2 answers
The undesirable plants in the field are called weeds

Kritika Singh 1 day, 22 hours ago

Weeds are the unwanted plants which grows along the cropunder hospitality given to crop..They harm plants and take all its nutrition, water, manure and other things given to plant and stops its proper growths
Write the short story. On harmful effects of microorganisms ?????
  • 1 answers

Yogita Ingle 1 day, 23 hours ago

Harmful effects of microorganisms:

  1. Bacteria: Causes various diseases such as typhoid, diarrhea, and cholera.
  2. Fungi: Causes a large number of diseases in plants and in animals such as rust diseases in plants, fruit rot in apple, red rot in sugar cane and ring worm disease in human beings.
  3. Algae: Algal boom in water (rapid growth of algae) causes poisonous effect after they die, which in turn results in the death of aquatic organisms.
  4. Protozoa: Causes Amoebic dysentery, pyorrhoea and sleeping sickness etc.
  5. Virus: Cause small fox, common cold, influenza, herpes, hepatitis, polio and rabies.
Keywords of chapter 4
  • 0 answers
What is mitosis and meiosis
  • 1 answers

Yogita Ingle 2 days, 2 hours ago


  • Mitosis is a continuum of changes but biologists like break down the stages of mitosis into four main stages, prophase, metaphase, anaphase and telophase.
  • The focus in this class is on an understanding of the process and not a memorization of phases.
  • The only phase name you will need to remember is metaphase.
  • In mitosis the nuclear membrane is broken down, spindle fibers (microtubules) attach to the chromatids at the centromere and pull apart the chromatids.
  • When the chromatids reach separate ends of the cells the spindle fibers disintegrate and a nuclear membrane rebuilds around the chromosomes making two nuclei.
  • Each nucleus is identical to the original nucleus as it was in G1.


  • Meiosis is the form of nuclear cell division that results in daughter cells that have one half the chromosome numbers as the original cell.
  • In organisms that are diploid, the end result is cells that are haploid. Each daughter cell gets one complete set of chromosomes, i.e., one of each homologous pair of chromosomes.
  • In humans this means the chromosome number is reduced from 46 to 23.
  • The only cells that undergo meiosis will become sperm or eggs.
  • The joining together of a sperm and egg during fertilization returns the chromosomes number to 46.
  • Cells that undergo meiosis go through the cell cycle including the S phase so begin the process with chromosomes that consist of two chromatids just as in mitosis.
  • Meiosis consists of meiosis I and meiosis II. In meiosis I homologous chromosomes are separated into different nuclei.
What is substances
  • 1 answers

Yogita Ingle 2 days, 2 hours ago

Substances are classified into two types. They are,

Pure Substance:  A substance which is made of one kind of particle.
Examples - iron, aluminium, silver and gold.

Mixtures:  A substance which contains two or more different particles is known as mixtures.
Example: Salt solution is made up of two components, salt and water. Therefore,salt solution is a mixture.

Mentio the uses of cotton fibre and jute fibre
  • 1 answers

Yogita Ingle 2 days, 6 hours ago

Jute fiber

  • Jute fiber is used  for making carpets,gunny bags,ropes and bags.
  • Source of earning money.
  • Used as a packing material.


  • Apparel - Wide range of wearing apparel: blouses, shirts, dresses, childrenswear, active wear, separates, swimwear, suits, jackets, skirts, pants, sweaters, hosiery, neckwear.
  • Home Fashion - curtains, draperies, bedspreads, comforters, throws, sheets, towels, table cloths, table mats, napkins
What ate the advantages of sprinkler system
  • 4 answers
It saves water and time
The advantage is that the water is not wasted and given to the crops sufficiently according to their need.

Yogita Ingle 2 days, 6 hours ago

A main pipeline is laid in the field.Perpendicular pipes having rotating nozzles at the top are joined to the main pipelines at regular intervals.When water from a tube-well is allowed to flow through the main pipelines under pressure with the help of a pump,it escapes from the rotating nozzles.This water gets sprinkled on the crop plants as if it is raining.
1) It is more useful for the uneven land where sufficient water is not available.
2) It is very useful for sandy soil.

Π!Kku❤Π¤Π! $H@®M@ 2 days, 7 hours ago

Advantages of sprinkler system is they distrubute water from uneven land
Where the deoxyribonuclieac acid in plant and animal cell present?
  • 2 answers

Priya Sharma 2 days, 1 hour ago

* in the nucleus of all cells

Priya Sharma 2 days, 1 hour ago

The DNA is present in the in all cell ,in form of chromatin fibres
What is nitrogen firation?
  • 2 answers

Muskan Singh 1 day, 21 hours ago

The process of conversion of atmospheric nitrogen into nitrogeneous compound and making it useful to plants is called nitrogen fixation .... These are usually done by microorganisms....

Yogita Ingle 2 days, 22 hours ago

The process of conversion of atmospheric nitrogen into nitrogenous compounds and making it available for plants is called as nitrogen fixation. The organisms which fix nitrogen to plants are called as nitrogen fixers. Microorganisms in the soil convert atmospheric nitrogen into ammonium compounds, thereby enabling the survival of plants and animals.

How Tsumni is formed
  • 1 answers

Π!Kku❤Π¤Π! $H@®M@ 2 days, 20 hours ago

Tsunami is a formed by a reason of earthquake tsunami is fprmed by on a sea oveans
Name the types of microorganisms?? Which are classified in how many groups??
  • 2 answers

Rakesh Kumar 2 days ago

The type of microorganisms are:- 1.virus 2.bacteria 3.protozoa 4.bacteria 5.algae

Yogita Ingle 3 days, 5 hours ago

  • Microorganisms make up a large part of the planet’s living material and play a major role in maintaining the Earth’s ecosystem.
  • Microorganisms are divided into seven types: bacteria, archaea, protozoa, algae, fungi, viruses, and multicellular animal parasites ( helminths ).
Define drip irrigation
  • 2 answers

Shejinah Christoe 3 days, 21 hours ago

In this system the water falls drop by drop at the base of the plants and the water is supplied to the roots directly

Sheetal Kaushal 3 days, 22 hours ago

The process by which water is send to the plants by pipe in which water falls by drips of water
  • 1 answers

Aryan Vats 3 days, 4 hours ago

Farmers store grains in jute bags or metallic bins . How ever , large scale storage of grains is done in silos to protect them from pest like rat and insects .
Define sillos
  • 1 answers

Alok Prakash 2 days, 23 hours ago

It is shaped in cilendrical shape it looks like a tank all crops are protectively kept inside it to protect them from insects n other harming organisms.

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