Science

Application of radioactivity: • Health: 1. Found extensive use in diagnosis and therapy eg. Phosphorous-32 is used to identify the cancerous cell. As cancer cell absorb more phosphorous, Iodine 131 is employ to determine cardiac output, plasma volume and fat metabolism and particularly to measure the activity of thyroid gland. 2. To treat cancer cells: … Read more

Answer. Moon exploration has many possibilities: We could make use of lunar resources to facilitate scientific and economic activity in the vicinity of both Earth and Moon (so-called cis-lunar space) as well as future exploration deeper into the Solar System. We can consider the importation of lunar resources to the Earth’s surface where they would … Read more

Genetic recombination is the process by which two DNA molecules exchange genetic information, resulting in the production of a new combination of alleles. In eukaryotes, genetic recombination during meiosis can lead to a novel set of genetic information that can be passed on to progeny. Most recombination is naturally occurring. During meiosis in eukaryotes, genetic … Read more

Steps of photosynthesis  Carbon dioxide in the atmosphere enters the plant leaf through stomata, i.e., minute epidermal pores in the leaves and stem of plants which facilitate the transfer of various gases and water vapor.  Water enters the leaves, primarily through the roots. These roots are especially designed to draw the ground water … Read more

India’s Light Combat Aircraft (LCA) together with its variants, is the smallest and lightest Multi-Role Supersonic Fighter Aircraft of its class. This single engine, Compound-Delta-Wing, Tailless Aircraft is designed and developed by ADA with HAL as the principal partner along with DRDO, CSIR, BEL, DGAQA, IAF & IN to meet diverse needs of the Indian … Read more

SCNT is a laboratory technique for creating an ovum with donor nucleus. In it, nucleus containing the organism’s DNA of somatic cell (a body cell other than sperm or egg cell) is removed and rest of cell discarded. The nucleus of somatic cell is then inserted into enucleated egg cell which reprograms somatic cell nucleus … Read more

The environment-friendly bio-toilets for passenger coaches were developed jointly by Indian Railways and Defence Research and Development Organisation (DRDO).In the bio-toilet fitted coaches, human waste is collected in bio digester tanks below the toilets and is decomposed by a consortium of anaerobic bacteria.By the process of hydrolysis, acetogenesis, acidogenesis and methanogenesis, the anaerobic bacteria converts … Read more

To describe the phenomena related to magnets, lines are used to depict the force existing in the area surrounding the magnet. These lines are called the magnetic lines of force. These lines do not exist actually, but are imaginary lines that are used to illustrate and describe the pattern of the magnetic field. As shown … Read more

Stem Cells: Stem cells are a class of undifferentiatedcells that are able to differentiate into specialized celltypes. Commonly, stem cells are of the followingtypes: Embryonic stem cells – derived from the inner cellmass of an embryo and these are capable offorming any cell types of the bodyAdult stem cells – also known as somatic stem … Read more

Immunity is the ability of the body to fight against infectious agents. The immunity can be classified as innate immunity and acquired immunity. Innate immunityis a non-specific type of defense mechanism.  It has four types: i) Physical barrier: Example, skin covering of the body, secretion of mucous in the respiratory tract ii)Physiological barrier: Example, acid in the … Read more