Notes and Study material for Exams
Usefulness of Plants and human affairs (utility) Food Plants are the main Join Our Telegram Channel source of food for humans. Plants, unlike humans and animals, manufacture their own food. They do so by the process known as Photosynthesis in their green leaves by use of sunlight. They can convert and store the … Read more
Usefulness of animals and human affairs As food The human Population exploits a large number of animal species for food, both of domesticated Livestock species in Animal Husbandry and, mainly at sea, by hunting wild species. Marine fish of many species, such as herring, cod, tuna, mackerel and anchovy, are caught commercially, forming … Read more
Use of I.T. in various Services An important application of information technology is video on demand. It is very common now a days. The cable tv operator provides services to watch any video clipping, movie or any favourite tv program. The channel is established from the computer at home and the cable operator. … Read more
Citizenship The need to promote a world community of scientifically and technologically literate citizens was regarded as urgent by the World Conference on Education for All held in Jomtien in 1990. The UNESCO Project 2000+, committed to developing appropriate structures and activities to foster scientific and technological literacy for all, in all the … Read more
QUICK REVISION ( ARTICLE:3, SCIENCE): TYPE OF Nuclear Reactors COMPONENTS OF NUCLEAR REACTOR: Fuel: Usually pellets of uranium oxide (UO2) arranged in tubes to form fuel rods. The rods are arranged into fuel assemblies in the reactor core • Moderator: This is material which slows down the neutrons released … Read more
Reproductive systems The reproductive system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex HORMONES. A gamete is a haploid cell that combines with another haploid gamete during fertilization. Sex hormones are chemical messengers that control sexual development and Reproduction. The male reproductive system consists … Read more
Tissues Tissue, in physiology, a level of organization in multicellular organisms; it consists of a group of structurally and functionally similar cells and their intercellular material. Tissues are absent from unicellular organisms. Even among the simplest multicellular species, such as sponges, tissues are lacking or are poorly differentiated. But multicellular animals and Plants … Read more
Telecommunication Telecommunications, also known as telecom, is the exchange of information over significant distances by electronic means and refers to all types of voice, data and video transmission. This is a broad term that includes a wide range of information transmitting technologies such as telephones (wired and wireless), microwave communications, fiber optics, satellites, … Read more
Technology with a Human Face Technology and the Human Race The human race has indeed gone far with technology. From the age when he still used wooden and stone tools to a powerful era of silicon and steel, he ceased to be a helpless prey to a number of predators to become a … Read more
TRENDS IN Nuclear policy, NPT AND CTBT Nuclear policy of india Important points of india’s nuclear policy are as follows: Building and maintaining a credible minimum deterrent. nuclear weapons will only be used in retaliation against a nuclear attack on Indian Territory or on Indian forces elsewhere. Nuclear retaliation to a first strike … Read more