Science

(a)LED:  Led is light emitting diode. It is a pn junction diode, which emits light when gets activated. When a suitable energy is applied , electron combines with the electron holes  within the device releasing energy in the form of photons.LED lamps have a lifespan and electrical efficiency which are several times longer than incandescent … Read more Discuss the following a) LED b) Insulated Gate Bipolar transistor c) Properties of tungsten

  (a)Male and Female reproductive organ:    The male reproductive organs include a pair of testes (singular, testis), two sperm ducts and a penis. The testes produce the male gametes called sperms. The female reproductive organs are a pair of ovaries, oviducts (fallopian tubes) and the uterus. Ovary produces female gametes called ova (eggs).   (b)Asexual production:  It is a … Read more Give an account of following: a) Male and female reproductive organs b) Asexual production c) Binary fission d) Fertilisation

Gametogenesis :  The gametogenesis is the formation of gametes i.e. sperm in males and ovum in females. It is also known as spermatogenesis and Oogenesis. Insemination:        Insemination is the deliberate introduction of sperm into a female animal or plant for the purpose of impregnating or fertilizing the female for sexual reproduction. The sperm is introduced … Read more Discuss the reproductive events in the Human?

Blood circulates in our body and it transport substance like digested food from the small intestine to the other parts of the body. It carries oxygen from lungs to the cells of the body. It also transport waste for removal from the body. Major components of Blood are as follows: Plasma: Plasma is the liquid … Read more Explain the composition of blood.

Draw diagram Basis Mitosis Meiosis Number of divisions One Two – meiosis 1 and meiosis II DNA replication Occurs during interphase Occurs during interphase Role Production of somatic cells for growth of the body Produces gametes or gametogenesis Daughter cell produced Two diploid cells that are genetically identical to parent Four haploid cell(n) containing half … Read more Tabulate the difference between mitosis and meiosis.

A) What is ultrasound waves and outline its benefits? Waves which have frequency more than 20,000 Hz and which are not audible to human ears but audible to dogs, cats , bats, whales. Ultrasounds are used in various different fields. They are used to detect objects and measure distance. Ultrasound imagining is used in the … Read more A) What is ultrasound waves and outline its benefits? b) Use of Inert gases

  Climate change is a result of rapid global warming. The increase of average temperature of earth is termed as Global warming. Global warming is a natural process which has been accelerated by anthropogenic activities. Because of this earth is not getting time to adjust to this change. This is causing climate change. Effect on … Read more How does the climate change affect the global distribution of fauna?

a) Project tiger: To conserve tiger project tiger was started in 1973 in Palamau Tiger reserve and various tiger reserves were created in the country based on a core-buffer strategy. It is sponsored by MoEF. Administered By NTCA. b) Project Hangul: State of J&K , along with IUCN and the WWF        prepared a project … Read more DMPQ: Give an account of following. ( Envt.) a) Project Tiger b) Project Hangul c) Sea Turtle Project d) Project snow leopard

It refers to the elimination/removal of metabolic wastes from the body. There are four major organs of excretions : kidney, lungs, skin and the liver. Out of these four organs kidneys are the primary excretory organs that eliminate metabolic waste products in the form of urine. The major functions of urine are: Excretions of wastes … Read more DMPQ: What is excretion? Outline the functions of kidney. ( Science)