Posted by Rita Jani 33 minutes ago
Posted by Khushdeep Kaur 38 minutes ago
Normal range of breathing rate per minute in an average adult person at rest is 15–18
This means on an average, an adult human being breathes in and out 15–18 times in a minute.
Posted by Ashwitha Reddy 55 minutes ago
Pure acids in the liquid state are exceedingly poor conductors of electricity. The fact that aqueous solutions of acids conduct electricity is definite evidence of the existence of ions in these solutions. Acids undergo dissociation in aqueous solution to form H+ ions.
When electricity is passed through an aqueous solution of an acid, the H+ ions reach the cathode and each H+ ion picks up one electron from the cathode to form H2 gas. Because of this reaction, an aqueous solution of acid conducts electricity.
HCl(aq) → H+(aq) + Cl–(aq)
Posted by Swati Priya an hour ago
HRD Minister Ramesh Nishank announced a major CBSE syllabus reduction for the new academic year 2020-21 on July 7 which was soon followed by an official notification by CBSE on the same.
Considering the loss of classroom teaching time due to the Covid-19 pandemic and lockdown, CBSE reduced the syllabus of classes 9 to 12 with the help of suggestions from NCERT.
The CBSE syllabus has been rationalized keeping intact the learning outcomes so that the core concepts of students can be retained.
Posted by Dhrangi Prakash 3 hours ago
Leeuwenhoek discovered the free living cells in pond water for the first time. In the year 1674, with the help of improved microscope.
Posted by Paru 😎 14 hours ago
|This phenomenon usually occurs in mirrors.||This phenomenon usually occurs in Lenses.|
|Reflection can simply be defined as the reflection of light when it strikes the medium on a plane.||Refraction can be defined as the process of the shift of light when it passes through a medium leading to the bending of light.|
|The light entering the medium returns to the same direction.||The light entering the medium travels from one medium to another.|
|Considering the light waves, they bounce from the plane and change direction.||The light waves pass through the surface while simultaneously change from medium to medium.|
|The angle of incidence of the light is equal to the angle of reflection.||The angle of incidence is not equal to the angle of reflection.|
Posted by Jyothikrishna Rompicharla 15 hours ago
Oersted showed that electricity and magnetism are related to each other.His research later used in radio, television etc.
The unit of magnetic field strength is named Oersted in his honour.
Posted by Jessie J 23 hours ago
The seed contains the future plant or embryo which develops into seedling under appropriate conditions .
Posted by Dikshant Mashane 1 day ago
Posted by Ni Nanthi 1 day ago
1. Forms two daughter individuals
1. Forms many daughter individuals
2. Divides only once
2. Divides repeatedly
3. No residue is left
3. Residue is left
4. Takes place in favourable conditions
4. Takes place in favourable as well as unfavourable conditions
5. Immortality is present
5. Immortality is absent
Example: Amoeba reproduces by binary fission
Example: Plasmodium reproduces through multiple fission
Posted by Ambili R.S 1 day, 1 hour ago
There are three different stages in the formation of urine by the filtration of blood through the nephrons. The process of urine formation in kidneys include the following steps:
(i) Glomerular filtration - Urine formation begins when the blood is filtered by the glomerulus then enters the Bowman's capsule and the glomerular filtrate is formed. The afferent arteriole entering the glomerulus is wider than the efferent arteriole in diameter. This increases the blood pressure within the glomerulus helps in the filtration. Glomerular filtrate is formed of all blood constituents except corpuscles and plasma proteins.
(ii) Tubular reabsorption - When the glomerular filtrate comes to the proximal tubule then the essential nutrients are reabsorbed. Glucose, amino acids, water, ions like sodium, potassium, chloride, bicarbonate, magnesium, calcium are reabsorbed from the glomerular filtrate. When the filtrate finally comes to the collecting duct ADH (anti-diuretic hormone) acts and reabsorbs the excess water and decreases the urine volume.
(iii) Tubular secretion - When the glomerular filtrate is in the proximal tubule creatinine, uric acid are secreted in it. When the filtrate goes to the distal part urea, potasium ion and some hydrogen ions are secreted in the form of urine.
Posted by Amal Fathima 1 day, 3 hours ago
Niche is the particular area within a habitat occupied by an organism. It also referes to the unique functional position of a species in a community of an ecosystem. Every organism performs important physical and functional roles within an ecosystem, which determines its niche.
Posted by Sakshi Priya 1 day, 11 hours ago
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Posted by Priyanka Sharma 1 day, 13 hours ago
A n s w e r
Combustion of Liquified Petroleum Gas (LPG) is a chemical change because, after its combustion, the new substance formed changes chemically and cannot be turned back into LPG.
Posted by Nitya Nand Mishra 1 day, 17 hours ago
Valves are flap-like structures present in heart that allow blood to flow in one direction. The valves control the flow of blood through the heart by opening and closing during the contractions of the heart. The opening and closing functions of the valves are controlled by pressure differences generated within the heart, as well as some muscles located within the heart. The heart has two kinds of valves, atrioventricular and semilunar valves.
Thus there are four valves in all.
Posted by Priya Kumari 1 day, 17 hours ago
According to Fleming's left hand rule, stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If the first finger points in the direction of magnetic field and the second finger in the direction of current, then the thumb will point in the direction of motion or the force acting on the conductor.
Posted by Navroj Kaur Sandhu 1 day, 18 hours ago
Plants can change their shape with the help of cytoskeleton present in their cytoplasm during stress conditions.
Posted by Arya Jaiswal 1 day, 18 hours ago
Posted by Nikhil Kumar Sahu 1 day, 19 hours ago
Posted by Muskan Adwani 1 day, 20 hours ago
Posted by Mohammed Mohammed 1 day, 20 hours ago
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