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Ask QuestionPosted by Srishty Negi 3 years, 10 months ago
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Nidhi Kaurav 3 years, 9 months ago
Posted by Dharm Pal 3 years, 10 months ago
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Jai Ghosh 3 years, 9 months ago
Yogita Ingle 3 years, 10 months ago
Types of meristematic tissue are apical meristem, Intercalary meristem, lateral meristem.
- Apical meristem is present on root and shoot tips of the plant. This tissue divides and results in growth of stem and roots of the plant.
- Intercalary meristem is present on leaf base and nodes.
- Lateral meristem is responsible for increase in circumference i.e. girth of the stem or root of the plant.
Posted by Debarshis Sharma 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
The red colour bends the least and the violet colour bends the most. This is because the red colour has the maximum speed and the violet colour has the minimum speed.
Red colour is used for traffic signals because it has greater wavelength and is visible to our eyes more distinctly than any other colours.
Posted by Mukul Kumar 😎 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Canal Ray experiment is the experiment performed by German scientist Eugen Goldsteinin 1886 that led to the discovery of the proton. The discovery of proton which happened after the discovery of the electron further strengthened the structure of the atom. In the experiment, Goldstein applied high voltage across a discharge tube which had a perforated cathode. A faint luminous ray was seen extending from the holes in the back of the cathode.
Posted by Mukul Kumar 😎 3 years, 10 months ago
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Mukul Kumar 😎 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
The discovery of the proton is credited to Ernest Rutherford, who proved that the nucleus of the hydrogen atom (i.e. a proton) is present in the nuclei of all other atoms in the year 1917.
Posted by Parth Dariyani 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
Endocytosis is the process of actively transporting molecules into the cell by engulfing it with its membrane. Endocytosis and exocytosis are used by all cells to transport molecules that cannot pass through the membrane passively. Exocytosis provides the opposite function and pushes molecules out of the cell. Like all systems in the human body, the need for homeostasis enables an equal flow of molecules in and out of the cell.
Posted by Anshu Kumari 3 years, 10 months ago
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V.Keerthana V 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
endoplasmic reticulum
Ribosomes on the outer surface of the endoplasmic reticulum play an important role in protein synthesis within cells.
Endoplasmic reticulum (ER) is a network of reticulum of tiny tubular structures scattered in the cytoplasm. It is of two types on the basis of ribosomes- 1. Rough ER is the presence of ribosomes which help in protein synthesis. 2. Smooth ER is the absence of ribosomes which help in lipid synthesis.
Posted by Anshu Kumari 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Cell Membrane
A thin semipermeable membrane layer of protein and fats surrounding the cell. Its primary role is to protect the cell from its surrounding. Also, it controls the entry and exit of nutrients and other microscopic entities into the cell.
Nuclear Membrane
It is a double-membrane structure that surrounds the nucleus. It is also referred to as the nuclear envelope.
Nucleus
It is an organelle that contains several other sub-organelles such as nucleolus, nucleosomes and chromatins. It also contains DNA and other genetic materials.
Centrosome
It is a small organelle found near to the nucleus which has a thick centre with radiating tubules. The centrosomes are where microtubules are produced.
Lysosome (Cell Vesicles)
They are round organelles surrounded by a membrane and comprising digestive enzymes which help in digestion, excretion and in the cell renewal process.
Cytoplasm
A jelly-like material which contains all the cell organelles, enclosed within the cell membrane. The substance found within the cell nucleus, contained by the nuclear membrane is called the nucleoplasm.
Golgi Apparatus
A flat, smooth layered, sac-like organelle which is located near the nucleus and involved in manufacturing, storing, packing and transporting the particles throughout the cell.
Mitochondrion
They are spherical or rod-shaped organelles with a double membrane. They are the powerhouse of a cell as they play an important role in releasing energy.
Ribosome
They are small organelles made up of RNA-rich cytoplasmic granules, and they are the sites of protein synthesis.
Endoplasmic Reticulum (ER)
This cellular organelle is composed of a thin, winding network of membranous sacs originating from the nucleus.
Vacuole
A membrane-bound organelle present inside a cell involved in maintaining shape and storing water, food, wastes, etc.
Nucleopore
They are tiny holes present in the nuclear membrane which are involved in the movement of nucleic acids and proteins within the cell.
Posted by Subrat Nayak 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
To calculate the number of moles, we use the equation:
Calculating the number of moles in 56 g nitrogen gas
Molar mass of nitrogen gas = 28 g/mol
Putting the values in above equation, we get:
1 mole of gas contains 2 moles of nitrogen atoms.
2 moles gas contains =
of nitrogen atoms.
Posted by Unnati Bornare 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.
When dealing with particles at an atomic (or molecular) level, even one gram of a pure element is known to contain a huge number of atoms. This is where the mole concept is widely used. It primarily focuses on the unit known as a ‘mole’, which is a count of a very large number of particles.
Posted by Ak Rt 3 years, 10 months ago
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Posted by Aarushi Erande 3 years, 10 months ago
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V.Keerthana V 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
| Isobars | Isotopes |
| Chemicals elements which have the same mass | Different atomic structure of the same element |
| The atomic masses are equal | The atomic masses are different |
| Often the physical properties are similar |
Usually, physical properties are different |
| Atomic numbers are different | Atomic numbers are the same |
| Chemical elements are different | same chemical elements but in different forms |
Posted by Swathi Raikar Nirmala 3 years, 10 months ago
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Meghna Thapar 3 years, 10 months ago
Separation of hydrogen isotopic water by graphene oxide membrane in membrane distillation was carried out for the first time.
</dd> <dt>•</dt> <dd>An effective functionalization method of graphene oxide membrane was developed.
</dd> <dt>•</dt> <dd>Near-super hydrophobic graphene oxide membrane surface was achieved.
</dd> <dt>•</dt> <dd>Near-super hydrophobic membrane surface and synergistic effect account for the enhanced separation factor.
</dd> </dl>Posted by Anshu Kumari 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Endoplasmic reticulum” might be rough and it posses ribosomes. The smooth type of them plays vital role in formation of new lipids in which the smooth membrances are embedded by the enzymes.
Only few proteins will deposited in “endoplasmic reticulum” the remaining are moved to the “golgi apparatus”. These apparatus are situated near the “endoplasmic reticulum” and next to each other. Some proteins are secreted from “golgi apparatus” were forwarded to “lysosomes” which is also called as cell membrane.
While other proteins were pushed to cell exterior secretion.
Posted by Tanveer Khan 3 years, 10 months ago
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??? ?? 3 years, 9 months ago
Aarju Sahu 3 years, 10 months ago
Divya Kumari 3 years, 10 months ago
Sanskar Shukla 3 years, 10 months ago
Sanskar Shukla 3 years, 10 months ago
Posted by Gaurab Saha 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
(pleura) between the terga and sterna of the thorax and abdomen with a pair of fine scissors.
Posteriorly the two incisions should meet at the hindmost end of the abdomen. Proceed forward up to the anterior end of the thorax.
Give a transverse incision along the anterior border of the first thoracic segment and carefully remove the terga. The thoracic and the abdominal cavity are exposed. Put clear water in the tray. Remove fat bodies and tracheae to expose internal organs.
Posted by Sanskar Shukla 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
,O2 is a molecule of element consisting of combination of 2 atoms of oxygen. 2O denotes two seperate oxygen atoms Which are not together. O2 means there are 2 atoms of oxygen in O2 formula. 2O means there are 2 molecules of oxygen.
Posted by ? " 3 years, 10 months ago
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Vishal Chaudhary 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
Golgi
Lysosomes are small vesicles containing hydrolytic enzymes and surrounded by a single membrane of up to 100nm thickness. They are formed by Golgi apparatus and contain some 60 different types of acid hydrolases for digestion of various materials. The cisternae of the Golgi body is bud off in the form small vesicles and fused with the acidic body to acid to form the primary lysosome.
Posted by 조진 우 3 years, 10 months ago
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Posted by Antra Dubey 3 years, 10 months ago
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??? ?? 3 years, 10 months ago
Gaurav Seth 3 years, 10 months ago
Inertia and momentum are 2 concepts associated with the study of the motion of solid bodies. Momentum and inertia are both used to explain the current state of a body. Both are concepts related to the mass of the object.
Inertia: a characteristic of an object that resists changes to its state of motion.
- Explanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.
- Inertia= if the body is at rest it will remain rest and it is moving it will continue moving in
Momentum: The resistance of an object to a change in its state of motion.
- Explanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the object
- Momentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V)
Yogita Ingle 3 years, 10 months ago
Inertia and momentum are 2 concepts associated with the study of the motion of solid bodies. Momentum and inertia are both used to explain the current state of a body. Both are concepts related to the mass of the object.
Inertia: a characteristic of an object that resists changes to its state of motion.
- Explanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.
- Inertia= if the body is at rest it will remain rest and it is moving it will continue moving in
Momentum: The resistance of an object to a change in its state of motion.
- Explanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the object
- Momentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V)
Posted by Vaibhav Vaibhav 3 years, 10 months ago
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Gaurav Seth 3 years, 10 months ago
Newton's third law is:
<font color="#FF0000"><font style="user-select: initial !important;">For every action, there is an equal and opposite reaction.</font></font>
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Posted by Vaibhav Vaibhav 3 years, 10 months ago
- 2 answers
Gaurav Seth 3 years, 10 months ago
In order to calculate the gravitational force between two objects with masses of m1 and m2 , the equation is: where G is the gravitational constant (6.67E-11 m3 s-2 kg-1), r is the distance between the two objects, and F is the magnitude of the force between the objects.
Posted by Divya Kumari 3 years, 10 months ago
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??? ?? 3 years, 9 months ago
Shailee Mathpal 3 years, 10 months ago
Yogita Ingle 3 years, 10 months ago
The symbol of copper is taken from the Latin word 'Cuprum'.
So the first two letters of this word that is Cu is taken as the symbolic name of copper.
Soumyadeep Banik 3 years, 10 months ago
Posted by Nancy Narang 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
In astronomy, Kepler’s laws of planetary motion are three scientific laws describing the motion of planets around the sun.
- Kepler first law – The law of orbits: According to Kepler’s first law,” All the planets revolve around the sun in elliptical orbits having the sun at one of the foci”. The point at which the planet is close to the sun is known as perihelion and the point at which the planet is farther from the sun is known as aphelion.
- Kepler’s second law – The law of equal areas:: ” The radius vector drawn from the sun to the planet sweeps out equal areas in equal intervals of time”
As the orbit is not circular, the planet’s kinetic energy is not constant in its path. It has more kinetic energy near perihelion and less kinetic energy near aphelion implies more speed at perihelion and less speed (vmin) at aphelion. If r is the distance of planet from sun, at perihelion (rmin) and at aphelion (rmax), then,
rmin + rmax = 2a × (length of major axis of an ellipse) . . . . . . . (1) - Kepler’s third law – The law of periods:
According to Kepler’s law of periods,” The square of the time period of revolution of a planet around the sun in an elliptical orbit is directly proportional to the cube of its semi-major axis”.
T2 ∝ a3
Posted by Nancy Narang 3 years, 10 months ago
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Shailee Mathpal 3 years, 10 months ago
Posted by Suren G 3 years, 10 months ago
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Posted by Sigatapu Durga 3 years, 10 months ago
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Yogita Ingle 3 years, 10 months ago
The sum of atomic mass of all the atoms present in the chemical formula of a substance is called its formula mass.
Molecular mass is the average relative mass of a single molecule of the given substance compared to 1/12 the mass of an atom of carbon12.
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Nidhi Kaurav 3 years, 9 months ago
2Thank You