(i) The uterus prepares itself every month to receive a fertilized egg/zygote- The inner uterus lining (endometrium) becomes thick and is... View Article
In the female reproductive system, the function of (i) ovary is to produce one egg every month. It is also responsible for the production of... View Article
Unsafe sexual acts can lead to sexually transmitted diseases. The two examples of sexually transmitted diseases caused by (i) virus: AIDS (HIV)... View Article
Government of India has prohibited prenatal sex determination by law to reduce the indiscrimination of female foeticide. Because of which the... View Article
Reabsorption of water from the urine depends upon the amount of water present in the body and the level of dissolved nitrogenous waste in the... View Article
The reaction of carboxylic acid with an alcohol in the presence of H2SO4 yields an ester.When primary alcohol is treated with a carboxylic acid... View Article
(i) Copper is heated in air to form the black copper oxide. The equation for the reaction is given below: 2Cu + O2 →2CuO (ii) Aluminium oxide is... View Article
Reaction for electrolytic refining: The impure copper metal is made ANODE and the pure metal of copper is CATHODE copper sulphate as an... View Article
Metals high up in reactivity series are extracted by electrolytic reduction. While those in the middle are extracted first by converting into... View Article
The cause of dispersion is the change in speed of light with wavelength .when white light enters the first surface of a Prism ,light of different... View Article
The apparent position of an object, when seen through the hot air, fluctuates or wavers. The basic cause of this observation is the refraction of... View Article
The relation between colour of scattered light and size of the scattering particle is, small size particles scatter the light of a shorter... View Article
Hypermetropia is also referred to as hyperopia or long-sightedness or far-sightedness. Hypermetropia is the condition of the eyes where the image... View Article
A person can see distant objects distinctly but cannot see nearby objects so clearly in this case, the image is formed behind the retina. This... View Article
Chromosomes are thread-like structures, made of proteins and DNA, found in the nucleus at the time of cell division.Each chromosome of a... View Article
These organs which have the same structure and embryonic origin but perform the different functions. Example of homologous organs are the... View Article
The ozone layer is continuously formed in the atmosphere because of the action of UV rays on molecular oxygen. The high-energy UV radiations... View Article
2000J → 200J → 20j (According to 10% law) The flow of energy from one trophic level to another trophic level in the food chain is explained in... View Article
(a) Trophic Levels The various steps in a food chain at which the transfer of food takes place are called trophic levels.The trophic level is... View Article
