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Ask QuestionPosted by Anshi Sheth 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
In a colloidal solution, the particle size is such (1 nm to 100 nm), that these particles scatter the light rays as they fall on them. Because of scattering, the path of the light as well as the particles become visible. But in a true solution, the particle size is so small (less than 1nm) that these particles are not in a position to scatter the light. Therefore, true solution does not show any Tyndall effect.
Posted by Prashant Rai 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
“The square of the period of orbit, divided by the cube of the radius of the orbit, is equal to a constant (Kepler's Constant) for that one object being orbited.”
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
- Kepler’s second law – The law of equal areas
- Kepler’s third law – The law of periods
Posted by Kumar Rohan 4 years, 11 months ago
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Kunga Dechen 4 years, 11 months ago
Affan Alam 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function.
Suchitra Sen 4 years, 11 months ago
Posted by Arunima Tripathi 4 years, 11 months ago
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Posted by Kumar Rohan 4 years, 11 months ago
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Nishant Singh 4 years, 11 months ago
Sania Khan 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
It is the smallest constituent unit of matter that posses the properties of the chemical element. Atoms don’t exist independently, instead, they form ions and molecules which further combine in large numbers to form matter that we see, feel and touch.
Suchitra Sen 4 years, 11 months ago
Posted by Neha Jangid ??? 4 years, 11 months ago
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Taniya Chauhan 4 years, 11 months ago
Posted by Aditya Soni 4 years, 11 months ago
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M U 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
1)They are called digestive bags. They destroy any foreign material which enter the cell such as bacteria and virus.
2)They remove worn out and poorly working cellular organelles by digesting them to make way for their new replacements.
3)They are called suicide bags of cell.
Gaurav Seth 4 years, 11 months ago
Lysosomes
The sac-like structures in a cell surrounded by membrane are called lysosomes.
They keep the cells clean by digesting and breaking the outside materials like bacteria, food entering the cell or worn-out cell organelles into small pieces.
They can digest these organic materials due to the presence of strong digestive enzymes that can brreak down organic compounds. Therefore, lysosome is also known as a suicide sac.
Many scientists believe that lysosomes are not present in plant cells and their function of lysosomes in plants is performed by vacuole.
Posted by Neha Jangid ??? 4 years, 11 months ago
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M U 4 years, 11 months ago
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Posted by Harleen Kaur 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
“Brownian motion refers to the random movement displayed by small particles that are suspended in fluids. It is commonly referred to as Brownian movement”. This motion is a result of the collisions of the particles with other fast-moving particles in the fluid.
Brownian motion is named after the Scottish Botanist Robert Brown, who first observed that pollen grains move in random directions when placed in water.
- The size of the particles is inversely proportional to the speed of the motion, i.e. Small particles exhibit faster movements.
- This is because the transfer of momentum is inversely proportional to the mass of the particles. Lighter particles obtain greater speeds from collisions.
- The speed of the Brownian motion is inversely proportional to the viscosity of the fluid. The lower the viscosity of the fluid, the faster the Brownian movement.
- Viscosity is a quantity that expresses the magnitude of the internal friction in a liquid. It is the measure of the fluid’s resistance to flow.
Posted by Neha Jangid ??? 4 years, 11 months ago
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Posted by Ritika Jangra 4 years, 10 months ago
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Posted by Tiger$ Praful Jawale 4 years, 11 months ago
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Tiger$ Praful Jawale 4 years, 11 months ago
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 4 years, 11 months ago
ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 4 years, 11 months ago
Posted by Kumar Rohan 4 years, 11 months ago
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M U 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
Cells are the basic, fundamental unit of life. So, if we were to break apart an organism to the cellular level, the smallest independent component that we would find would be the cell.
Posted by Neha Jangid ??? 4 years, 11 months ago
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Posted by Neha Jangid ??? 4 years, 11 months ago
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Posted by Neha Jangid ??? 4 years, 11 months ago
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Posted by Singh Gamdoor 4 years, 11 months ago
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Bhavya Madaan 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
- Apical Meristems – These meristems are located on the tip of the root, stem etc. They help in the growth of the root system as well as the shoot system. The various cell divisions along with the cellular enlargement help in the growth of the stem above the ground and the growth of the root below the ground.
- Intercalary Meristems – The intercalary meristems are located at the internodes or the base of the leaves. The intercalary meristems help in increasing the length of the internode. This is usually seen in monocotyledonous plants.
Posted by Dildar Khan 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
|
Mitosis |
Meiosis |
|
It is a type of cell division in which the daughter cells formed have exactly the same number of chromosomes as the parent cell. |
It is a type of cell division in which the number of chromosomes is reduced by half through the separation of homologous chromosomes in a diploid cell |
|
Two daughter cells are formed at the end of mitosis. |
Four daughter cells are formed at the end of meiosis. |
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The steps of mitosis are Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis |
The steps of meiosis are Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, Telophase II |
|
Crossing over does not occur |
Crossing over occurs |
Posted by Kritika Agarwal 4 years, 11 months ago
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Bhavya Madaan 4 years, 11 months ago
Gaurav Seth 4 years, 11 months ago
ANSWER Water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth. It is called the Elixir of life.water is a solvent due to the polarity of each water molecule. The hydrogen side of each water (H2O) molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge. This helps water dissociate ionic compounds into their positive and negative ions. The positive part of an ionic compound is attracted to the oxygen side of water while the negative portion of the compound is attracted to the hydrogen side of the water.
Posted by Krish Solanki 4 years, 11 months ago
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Taniya Chauhan 4 years, 11 months ago
Gaurav Seth 4 years, 11 months ago
Commercial unit of energy is kilowatt hour (kWh).
The SI unit of energy is joule.
1 kWh = 3.6x {tex} ${{10}^{6}}$J{/tex}
(ii) Given, P = 2500 W, t = 4 h
E = P/T = 2500/ 1000 x 4 = 10 kwH = 10 units.
Posted by 《Aruba》°°° 《Sayed》❤ 4 years, 11 months ago
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Posted by Tanisha Dahiya 4 years, 11 months ago
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Bhavya Madaan 4 years, 11 months ago
Likhita Gvk 4 years, 11 months ago
Posted by Shailza Dahiya 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
It is defined as the separation process in which two immiscible liquids are separated. This is done by pouring out the clear upper layer of liquid. Separation of a mixture of oil from water is an example of decantation.
Example
This process can also be used to separate two liquids that do not mix e.g., oil and water. When we leave the mixture of oil and water, two separate layers are formed, with water at the bottom and oil, being lighter, at the top. We can remove the oil layer from the top by pouring it into another vessel, which leaves us with the water layer at the bottom.
Posted by Gravit Kulhari 4 years, 11 months ago
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Gravit Kulhari 4 years, 10 months ago
Yogita Ingle 4 years, 11 months ago
R. H. Whittaker proposed the five kingdom classification. The five kingdom classification are- Monera, Protista, Fungi, Plantae and Animalia. The organisms which are placed under the kingdom Animalia are heterotrophic and depend on the other organisms for food. These are eukaryotic organisms with well-developed organelles. These are multicellular organisms which are composed of many cells and can perform activities like locomotion.
Posted by Preeti Verma 4 years, 11 months ago
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Posted by Bharat Malik 4 years, 11 months ago
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Gaurav Seth 4 years, 11 months ago
Vacuoles
They are storage sacs for solid or liquid content.In animals cell,they are small and temporary.They store water,glycogen and proteins,single membrane maintain water balance.
In plant cell they are large distinct and permanent.The vacuole is bounded by a membrane called Tonoplast.
It is filled with cell sap(Watery substance rich in sugar,amino acids,proteins,minerals).they provide rigidity and turgidity to cell.
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Nishant Singh 4 years, 11 months ago
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