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Ask QuestionPosted by Mishty Panchal 4 years, 4 months ago
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Posted by Harsh Tanwar 4 years, 4 months ago
- 2 answers
Meghna Thapar 4 years, 4 months ago
The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments. The nuclear membrane, sometimes referred to as the nuclear envelope, is the membrane that encloses the nucleus. This bilayer membrane is made of lipids, and encases the genetic material in eukaryotic cells. The nuclear membrane is made up of a double lipid bilayer.
Posted by Bipratik Dey 4 years, 4 months ago
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Posted by Nitin Karki 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
The limitations of J.J Thomson's model of an atom are:
1. J.J Thomson's model of the atom could not explain the results of Alpha particle scattering experiment carried out by Rutherford.
That is J.J Thomson's model of the atom could not explain why most of the positively charged Alpha particles pass Straight through the gold foil ,a few Alpha particles are deflected through small and large angles, Whereas a very few Alpha particles completely rebound on hitting the gold foil and turn back on their path.
2. J.J Thomson's model of the atom was just based on imagination it did not have any experimental evidence in its support like the Rutherford's Model of the atom.
Posted by Kunal Ranjan Ray 4 years, 4 months ago
- 4 answers
Posted by Thaarani Rani 4 years, 4 months ago
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Posted by Anjali Kumari 4 years, 4 months ago
- 2 answers
Kanav Dumra 4 years, 4 months ago
Yogita Ingle 4 years, 4 months ago
Plastids are double-membrane organelle which are found in the cells of plants and algae. Plastids are responsible for manufacturing and storing of food. These often contain pigments that are used in photosynthesis and different types of pigments that can change the colour of the cell.
There are different types of plastids with their specialized functions. Among which few are mainly classified based on the presence or absence of the Biological pigments and their stages of development.
- Chloroplasts
- Chromoplasts
- Gerontoplasts
- Leucoplasts
Posted by Rinky Khanna 4 years, 4 months ago
- 2 answers
Kanav Dumra 4 years, 4 months ago
Yogita Ingle 4 years, 4 months ago
Diffusion is nothing but the movement of molecules from it's higher concentration to loyer concentration.
Diffusion in gases is faster than in liquids & solids because in gases the particles are not fixed they can vibrate in all directions and move freely.
Hence diffusion of gases tells that the particles of a gas have higher movements unlike in solids &liquids.
Posted by Sarmistha Nag 4 years, 4 months ago
- 2 answers
Kanav Dumra 4 years, 4 months ago
Posted by Sakshi Kanhere 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
Yes they will work similarly in landfill sites the process of making them favourable is downstream processing.
They have to pass through tests and after passing then only they are approved for commercial use.
Posted by Siddhant Malik 4 years, 4 months ago
- 1 answers
Posted by Chitralekha Khaund 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Striated muscles are the skeletal muscles which are also known as voluntary muscles. They are called voluntary muscles because their action is under the control of the somatic nervous system and their movement can be controlled by us (Eg: Bicep muscles), unlike as in the case of involuntary muscles (Eg: cardiac muscles). The muscle fibers of striated muscles are multinucleated and cylindrical. These muscles are attached to the bones and tendons and are responsible for the movements of the skeleton. The striated muscles have longitudinal and cross striations.
Posted by Chitralekha Khaund 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
Muscular tissue is a specialized tissue in animals which applies forces to different parts of the body by contraction. It is made up of thin and elongated cells called muscle fibers. It controls the movement of an organism.
Movement is the main function of muscular tissue. They have the ability to contract and this is what brings about the movement of body parts. They also help to maintain body posture and position.
Posted by Priyanshu . 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Temperatures measured on the Kelvin scale are reported simply as K, not °K because it is an absolute scale. The Kelvin temperature scale is a thermodynamic temperature scale for all universal events, such that all temperatures on this scale are positive. The freezing point of water is 273.15 K and the boiling point of water is 373.15°K.
Posted by Soni Gupta 4 years, 4 months ago
- 1 answers
Posted by Meghana Bhimer 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
| Plant tissue | Animal tissue |
| Cells of plant tissue have cell wall. | Cells of animal tissue do not have cell wall. |
| Some tissues are living and some are dead. | All tissues are living. |
| Growth is restricted to the tips of stem and roots. | Growth is uniform all over the body. |
| They are mainly of two types permanent tissue and meristematic tissue. | They are of four types muscle tissue, epithelial tissue, nervous tissue and connective tissue. |
| These tissues require less energy and maintenance as plants do not require movement. | Due to entensive body mobility these tissues require more energy and maintenance. |
| They provide strength and support to the plant. | They control all functions. |
Posted by Bhavna Soni 4 years, 4 months ago
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Yogita Ingle 4 years, 4 months ago
Hypotonic solution is a solution which, contains lesser solute concentration. If animal and plant cells are kept in a hypotonic solution then endosmosis will occur. Endosmosis is a process in which the water molecules move from outside of the cell of lower solute concentration to the inside of the cell of higher solute concentration through the cell membrane or cell wall. Due to endosmosis, both animal and plant cells will swell.
Posted by Meghana Bhimer 4 years, 4 months ago
- 3 answers
Insha Fatima 4 years, 4 months ago
Insha Fatima 4 years, 4 months ago
Yogita Ingle 4 years, 4 months ago
| Unicellular organisms are composed of a single cell | Multicellular organisms are composed of more than one cell |
| Irregular in shape | Have a definite shape |
| Simple body organization | Complex body organization |
| A single cell carries out all necessary life processes | Multiple cells perform different functions |
| The total cell body is exposed to the environment | Only the outer cells are exposed to the environment |
| Division of labour is at the organelle level | Division of labour is at cellular, tissue, organs and organ system level |
| Includes both eukaryotes and prokaryotes | Includes only eukaryotes |
| A lifespan of a unicellular organism is usually short | Multicellular organisms have a comparitively longer lifespan |
| Injury to the cell leads to the death of the organism | Injury to a cell does not cause death of the multicellular organism |
| Reproduce by asexual reproduction | Reproduction happens sexually as well as asexually |
| Cell differentiation is absent | Cell differentiation is obvious |
| They can be autotrophs or heterotrophs | They include both autotrophs and heterotrophs |
| They are microscopic in nature | They are macroscopic in nature |
| Bacteria, amoeba, paramecium, and yeast are examples of unicellular organisms | Humans, animals, plants, birds and insects, are examples of multicellular organisms |
Posted by Mishty Panchal 4 years, 4 months ago
- 4 answers
Shakti Chaturvedi 4 years, 3 months ago
Posted by Mishty Panchal 4 years, 4 months ago
- 5 answers
Mishty Panchal 4 years, 4 months ago
Nikhil Chouhan 4 years, 4 months ago
Posted by Deepali Singh 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
Feudalism(feudal system) was common in France before the French revolution.
The system consisted of the granting of land for return for military services.
In a feudal system, a peasant or worker received a piece of land in return for serving a lord or king, especially during times of war.
The peasant now is called as a VASSAL.
In the late medieval period, this system became hereditary.
Feudalism discouraged trade and economic growth. And it discouraged unified government.
Posted by Aditya Rawat 4 years, 4 months ago
- 1 answers
Meghna Thapar 4 years, 4 months ago
Under low pressure condition we can boil water at room temperature. Explanation: When we heat the water, the temperature of the water rises. Due to this the water molecule “gains kinetic energy” and starts to move and escapes to the atmosphere in the form of vapor. Water typically boils at 100°C when the pressure is equal to 1 atm, but when the pressure is reduced using a vacuum pump, the water boils at room temperature. When the pressure above a liquid is reduced, the vapor pressure needed to induce boiling is also reduced, and the boiling point of the liquid decreases.
Posted by Kritika Kansal 4 years, 4 months ago
- 2 answers
Shakti Chaturvedi 4 years, 3 months ago
Yogita Ingle 4 years, 4 months ago
In humid weather it takes longer time to dry wet clothes because the moisture and water vapour are present in humid weather they gets slight absorbed by the clothes and clothes maintain their wetness due to this they take a longer time to dry and in humid weather they don't get enough sunlight to dry themselves at a faster or normal rate, so they take a long time due to these reasons.
Posted by Pujanshu Raj 4 years, 4 months ago
- 2 answers
Yogita Ingle 4 years, 4 months ago
Homogeneous mixture |
Heterogeneous mixture |
| It has a uniform composition | It has a non-uniform composition |
| It has only one phase | There are two or more phases |
| It can’t be separated out physically | It can be separated out physically |
| ‘homo’ means the same | ‘hetero’ means different |
| Example: a mixture of alcohol and water | Example: a mixture of sodium chloride and sand |
Kanav Dumra 4 years, 4 months ago
Posted by Aditya Rawat 4 years, 4 months ago
- 1 answers
Meghna Thapar 4 years, 4 months ago
Under low pressure condition we can boil water at room temperature. Explanation: When we heat the water, the temperature of the water rises. Due to this the water molecule “gains kinetic energy” and starts to move and escapes to the atmosphere in the form of vapor. Water typically boils at 100°C when the pressure is equal to 1 atm, but when the pressure is reduced using a vacuum pump, the water boils at room temperature. When the pressure above a liquid is reduced, the vapor pressure needed to induce boiling is also reduced, and the boiling point of the liquid decreases.
Posted by Abhishek K B 4 years, 4 months ago
- 2 answers
Geometrical Construction 4 years, 4 months ago
Posted by Banti Kumar 4 years, 4 months ago
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Posted by Manshi Rani 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
Stem cutting: Stem cutting refers to a process used during vegetative propagation whereby a piece of the plant’s stem is rooted in a growth medium such as moist soil. The stem cutting will thrive and grow as a new plant, which is entirely independent of the mother plant provided that the conditions are suitable. Plants like sugarcane, eggplant, black pepper, etc are propagated through stem cutting.
Posted by Kanav Dumra 4 years, 4 months ago
- 1 answers
Meghna Thapar 4 years, 4 months ago
Peroxisomes, sometimes called microbodies are generally small (about 0.1 – 1.0 µm in diameter) organelles found in animal and plant cells. They can vary in size within the same organism. They are called peroxisomes because they all produce hydrogen peroxide. Peroxisomes absorb nutrients that the cell has acquired. They are very well known for digesting fatty acids. They also play a part in the way organisms digest alcohol (ethanol). Because they do that job, you would expect liver cells to have more peroxisomes than most other cells in a human body.
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Rishit Bhatnagar 4 years, 3 months ago
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