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  • 1 answers

Yogita Ingle an hour ago

Osmosis Diffusion
It is limited only to the liquid medium. Occurs in all mediums – Solid, Liquid and gas.
Requires a semipermeable membrane. Do not require a semipermeable membrane.
Depends on the number of solute particles dissolved in the solvent. Depends on the presence of other particles.
Requires water for the movement of particles. Do not require water for the movement of particles.
Only the solvent molecules can diffuse. Both the molecules of solute and solvent can diffuse.
The flow of particles occurs only in one direction. The flow of particles occurs in all the directions.
The entire process can either be stopped or reversed by applying additional pressure on the solution side. This process can neither be stopped nor reversed.
  • 2 answers

Rajat Singh an hour ago

A person who writes accounts of important or historical events.

Gaurav Seth an hour ago

  • a person who writes descriptions of historical events as they happen.
  • a person who writes accounts of important or historical events.
  •  someone who writes chronicles. historian, historiographer - a person who is an authority on history and who studies it and writes about it
  • 3 answers

Harsh Rajput 6 minutes ago

Permanent tissues may be defined as a group of living or dead cells formed by meristematic tissue and have lost their ability to divide and have permanently placed at fixed positions in the plant body.

Gaurav Seth an hour ago

The permanent tissues are formed by the differentiated cells, which become specialised to perform specific functions like protection, support, storage and conduction. The permanent tissues always differentiate from the meristematic cells,

Rajat Singh an hour ago

When meristematic tissues loose their ability to divide they form group of dead cells called permanent tissues.
  • 1 answers

Yogita Ingle 2 hours ago

Heavy water consists of deuterium instead of hydrogen . Deuterium atom consists one proton and one neutron. Hence, there are total 10 neutrons in a heavy water molecule (2 from deuterium and 8 from oxygen).
Number of heavy water molecules = 10/20 {tex}{{N}{A}}{/tex} = {tex}0.5 {{N}{A}}{/tex}
Mass of neutrons present in 0.5 mol of heavy water = {tex}10/{{N}{A}} x 5 {{N}{A}} = 5 g{/tex}

  • 1 answers

Rishav Thakuria 4 hours ago

Tissue is a group of cells that are similar in structure and are arranged systemically together to perform a specific task.
  • 1 answers

Gaurav Seth 5 hours ago

m1 = 2kg, u1 = 10m/s, v1 = 1m/s

m2 = 5kg, u2 = 0m/s, v2 = ?

we know that-

m1u1 + m2u2 = m1v1 + m2v2

(2*10) + (5*0) = (2*1) + (5v2)

20 + 0 = 2 + 5v2

18 = 5v2

18 / 5 = v2

3.6 = v2

therefore, the velocity of the second body is 3.6 m/s

  • 1 answers

Samit Prasad 7 hours ago

On an average a normal human uses only 10% of the brain's capacity.
  • 1 answers

Aarti Balu 16 hours ago

Solids have no intermolecular spaces, liquid has moderate intermolecular spaces and gases have large intermolecular spaces between them
  • 1 answers

Gaurav Seth 21 hours ago

The fluid mosaic model was proposed by S.J. Singer and Garth L. Nicolson. This model explains the structure of the plasma membrane of animal cells as a mosaic of components such as phospholipids, proteins, cholesterol, and carbohydrates. These components give a fluid character to the membranes.

  • 5 answers

Insha Fatima 18 hours ago

Modern version of cell theory say that ( 1) all living organism are composed of cell and their product. ( 2 ) the cell is the structural and functional unit of life . ( 3 ) all cells aries from pre existing cells. ( 4 ) the smallest unit of life is the cell, i.e ,every organism starts its life as a single cell.

Rated Vlogs 19 hours ago

The theory is the basic introduction of cell.In this it's is given that cell was first discovered by Robert hooke. He discovered the dead cell, through simple microscope.After that the living cell was discovered by Anton van leewhooke.The cell theory was given by sclerden and schween.The main points of cell theory are:- (I) cell is the basic or fundamental part of living body. (ii) The whole body is made up of cell. (iii)New cells form when pre-existing cell divides.

Akhil Dalal 19 hours ago

Basic thing all about new cell made up of old cell .

Gaurav Seth 19 hours ago


The Cell Theory is one of the basic principles of biology proposed by the scientists Theodor Schwann, Matthias Schleiden, and Rudolph Virchow.

It states that

i) All living organisms are composed of cells.

ii) The cell is the basic unit of life.

Cells arise from pre-existing cells.

Yogita Ingle 21 hours ago

Mathias Schleiden and Theodor Schwann in 1838 postulated Cell Theory.

The Cell Theory states that:

  1. All living organisms are formed of one or more cells.
  2. New cells arise from pre-existing cells by cell division.
  3. Cell is the fundamental unit of structure and function in living organism.
  • 2 answers

Rated Vlogs 19 hours ago

positive acceleration:-velocity/time example: (5m/s²) negative acceleration:- -velocity/time example: (-5m/s²)

Yogita Ingle 21 hours ago

When the motion of the body is opposite to the direction of acceleration we say the acceleration is negative and when the motion of the body is in same direction as that of acceleration we say the acceleration is positive.

  • 2 answers

Rajat Singh 19 hours ago

A force in which resultant on both the sides is not zero is known as unbalanced force.

Gaurav Seth 21 hours ago

A force where two forces acting in opposing directions on a body, are not equal in magnitude and in size, is known as an unbalanced force. In an unbalanced force, a body changes its position i.e. we can observe a moving object changing its direction, either increasing the speed or decreasing the speed and a body at rest starts to move and vice versa.

  • 2 answers

Rated Vlogs 19 hours ago

Negative acceleration is known as Retardation. example: (5m/s²)

Yogita Ingle 22 hours ago

When the velocity decreases with respect to time it is termed as retardation or deceleration
In reality negative acceleration is commonly called retardation Its SI unit is m/s2

  • 2 answers

Rated Vlogs 19 hours ago

(I)Velocity means displacement/time. (ii) SI unit is velocity is m/s (meter per second) (iii)It is a vector quantity.

Yogita Ingle 22 hours ago

  • Velocity: Velocity is the speed of an object moving in a definite direction.
  • The SI unit of velocity is also metre per second.
  • Velocity is a vector quantity; it has both magnitude and direction.
  • 1 answers

Yogita Ingle 22 hours ago

  • Speed: Distance travelled by the object in unit time.
  • The SI unit of speed is metre per second. This is represented by the symbol m s–1 or m/s.
  • Speed is a scalar quantity; it only has direction.
  • 2 answers

Yogita Ingle 22 hours ago

The sound waves are called mechanical waves because they need a material medium( like solid, liquid or gas ) for their propagation. The sound wave involve the vibrations of the particles of the medium through which they travel .

A sound wave is a disturbance that is transported through medium via the mechanism of a particle interaction a sound wave is called Mechanical wave
  • 2 answers

Shallu Mehta 8 hours ago


Yogita Ingle 1 day, 1 hour ago

A solution is a homogeneous mixture of two or more substances.  A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it (usually the component present in larger amount) is called the solvent. The component of the solution that is dissolved in the solvent (usually present in lesser quantity) is called the solute.

  • 1 answers

Rajat Singh 18 hours ago

Atoms can or can't exist independently. Both can happen.
  • 2 answers

Rajat Singh 18 hours ago

They are positively charged ions.

Yogita Ingle 1 day, 2 hours ago

Cations are positively charged ions. They are formed when a metal loses its electrons. They lose one or more than one electron and do not lose any protons. Therefore they possess a net positive charge. Some examples of cations are Calcium (Ca2+), Potassium (K+), hydrogen (H+).

  • 0 answers
  • 2 answers

Insha Fatima 18 hours ago

Cell organelles are the living parts of the cell found embedded in the cytoplasm. Some of these organelles are visible only under an electron microscope.

Yogita Ingle 1 day, 4 hours ago

The basic structure of cell consist of nucleus, plasma membrane and cytoplasm. Other than this different structures like Endoplasmic Reticulum(ER), Golgi body, Lysosomes, Mitochondria, Plastids and Vacuoles are also present. All of these are cell organelles. Presence of different cell organelles differ from organism to organism i.e. unicellular or multicellular organism. Cell organelle can be either membrane bound or can lack membrane.

  • 2 answers

Ranjan Mishra 8 hours ago

Inthis world anything is possibl

Shallu Mehta 1 day, 3 hours ago

Not possible

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