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Ask QuestionPosted by Navjot Kaur 4 years, 7 months ago
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Posted by Navjot Kaur 4 years, 7 months ago
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Akarsh Raj 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Na is symbol of normal sodium atom which have 11 protons in nucleus , with electronic configuration (2,8,1) having total 11 electrons in its all 3 shells. in this condition because nucleus have 11 protons, it have 11 unit positive charge and because of 11 electrons it have 11 unit negative charge . Because of equal number of positive charge and negative charge they cancel each other . that's why normal sodium atom (Na) is electrically neutral. But Na+ is positive ion of sodium. during chemical reaction sodium atom (Na) loses his one electron present last orbit. because only one electron is present in its last orbit , it is 3rd orbit . by losing this electron 3rd orbit loses its existence and second orbit having 8 electrons become outermost orbit and in this way it becomes stable. But now this atom have 10 electrons that is 10 negative charge and 11 protons that is 11 positive charge. in this condition number of positive charge is 1 unit more than negative charge . that's why sodium atom get unit positive change and sodium single positive (Na+) ion forms.
Posted by Yadav Rakesh 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
A complex tissue consist of more than one type of cells having a common origin which coordinate to perform a common function. Xylem and phloem are called complex tissues as, they are made up of different types of cells. Xylem is composed of four different types of cells (elements), namely (i) tracheids (ii)vessels (iii) xylem parenchyma (iv) xylem sclerenchyma (or fibre) Phloem is also composed of four different types of elements (i) sieve tubes (ii) companion cells (iii) phloem parenchyma (iv)phloem fibre T
Posted by Navjot Kaur 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Aerosol: When particles of solid or liquid dispersed in gaseous medium, the mixture is known as Aerosol. For example – cloud, smog, smoke etc.
Emulsion: Colloidal solution is called emulsion, when dispersing medium and dispersed phase both are liquid. For example – milk, butter, face cream, etc.
Posted by Khushi Verma 4 years, 7 months ago
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Bro . 4 years, 7 months ago
Posted by Tanisha Khandelwal 4 years, 7 months ago
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Tanisha Khandelwal 4 years, 7 months ago
Posted by Kunal Singh 4 years, 7 months ago
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Posted by Kavita Rajput 4 years, 7 months ago
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Bro . 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Archimedes’ principle states that, when an object is fully or partially immersed in a liquid, it experiences a buoyant force or upthrust, which is equal to the weight of liquid displaced by the object, i.e.Buoyant force or upthrust acting on an object= Weight of liquid displaced by the object.
A cork floats in the water whereas an iron nail sinks because the density of cork is less than the density of water. This means that the upthrust of water on the cork is greater than the weight of the cork. So, it floats. However, the density of an iron nail is more than the density of water. This means that the upthrust of water on the iron nail is less than the weight of the nail. So, it sinks.
Posted by Kavita Rajput 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Golgi apparatus plays the important role of packaging various substances for further use or for storage. If there was no Golgi apparatus, various substances would not be in a position to be transformed in proper forms for further use. Certain substances, like protein and lipid are important for the formation of plasma membrane and hence absence of Golgi apparatus will hamper the formation of new cells during cell division.
Posted by Kavita Rajput 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
The nucleolus is the organelle which produces ribosomes.
Posted by Kavita Rajput 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Endocytosis refers to imagination of a small region of plasma membrane, forming an intercellular membrane-bound vesicle. It has been observed in many kinds of animal cells, where the plasma membrane is in direct contact with external medium. Endocytosis is not shown by plant cells because a rigid cell wall is present over the plasma membrane in them. Thus, this process is found in animals only.
Posted by Dishu Tripathi 4 years, 7 months ago
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Nikita Pal 4 years, 7 months ago
Posted by Kamu Jadhav 4 years, 7 months ago
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Posted by Efat Naaz 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
| Angiosperms | Gymnosperms |
| A seed is produced by flowering plants and is enclosed within an ovary | A seed is produced by non-flowering plants and are unenclosed or naked. |
| The lifecycle of these plants are seasonal | These plants are evergreen |
| Has triploid tissue | Has haploid tissue |
| Leaves are flat in shape | Leaves are scalelike and needle-like in shape |
| Hardwood type | Softwood type |
| Reproduction rely on animals | Reproduction rely on wind |
| Reproductive system present in flowers (unisexual or bisexual) | Reproductive system present in cones and are unisexual |
Posted by Abhishek Kumar 4 years, 7 months ago
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Posted by Shanthosh 271105 4 years, 7 months ago
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Posted by Ayush Yaduvanashi 4 years, 7 months ago
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Posted by Rishu Thakur 4 years, 7 months ago
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Meghna Thapar 4 years, 6 months ago
The inverse square law proposed by Newton suggests that the force of gravity acting between any two objects is inversely proportional to the square of the separation distance between the object's centers.
Posted by Jay Prakash 4 years, 7 months ago
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Sneha Kumari 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Polyatomic ions: Those ions which are formed from groups of joined atoms are called polyatomic ions.
Compound ions are also called polyatomic ions.
For e.g
- Ammonium ion NH4+, is a compound ion which is made up of two types of atoms joined together nitrogen and hydrogen.
- Carbonate ion CO3²- , is a compound ions which is made up of two types of atoms joined together carbon and oxygen.
Posted by Shilpi Kumari 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
The mode of nutrition in agaricus is saprophytic because it belong from kingdom fungi and it feeds the dead and decay organic matter.
Posted by Ankit Sharma 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Causative agent of cholera is Vibrio cholerae. Vibrio cholerae is a bacterium.
Tuberculosis is caused by bacteria, Mycobacterium tuberculosis.
Anthrax is caused by bacteria Bacillus anthracis.
Influenza is caused by influenza virus.
Posted by David Talukdar 4 years, 7 months ago
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Posted by Suhani Seth 4 years, 7 months ago
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Jay Prakash 4 years, 7 months ago
Gaurav Seth 4 years, 7 months ago
Amoeba engulfs its food by the process of endocytosis (phagocytosis) in which pseudopodia are formed due to the flexibility of the plasma membrane. Amoeba obtains its food by the process of endocytosis. It has flexible cell membrane.
Posted by Himansu Kumar 4 years, 7 months ago
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Jay Prakash 4 years, 7 months ago
Gaurav Seth 4 years, 7 months ago
libosomes are called sucidalbags of the cells. They contain hydrolytic enzymes. If the cell is damaged, the lysosomes undergo autolysis and burst open. This results in the release of those hydrolytic enzymes The released enzymes then digest their own cell and ultimately the cell dies. Hence, they are called as suicidal bags of the cells.
Posted by Hashnen Belim 4 years, 7 months ago
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Gaurav Seth 4 years, 7 months ago
UNSTRIATED MUSCLE:smooth muscle and muscle tissues that contract without conscious control,having the form of thin layers of sheets made of spindle shaped,unstriated cells with single nuclei and found in the walls of internal organs such as stomach,intestine,bladder and blood vessels excluding the heart.
Posted by Vishwnath Prasad Shahu 4 years, 7 months ago
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Gaurav Seth 4 years, 7 months ago
Given, mass of body, m = 50 kg
h = 45 x15 = 675 cm = 6.75 m
t = 9 s, g = 10 m
PE = mgh = 50 x 10 x 6.75 = 3375 J
Power of the body = PE / time = Energy / time = 3375 / 9 = 375 W
Posted by Ojashvi Shukla 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Atomic mass of carbon is 12 hydrogen is 1 and oxygen is 16.
So the molecular mass of C2H5OH = 24 + 5 + 16 + 1 = 46 unit..
Atomic mass of magnesium is 24 sulphur is 32 and oxygen is 16.
So the molecular mass of MgSO4 = 24 + 32 + 64 = 120 unit
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