Raveena

Homo­lo­gus organs Homol­o­gy is a sim­i­lar­i­ty of struc­ture in var­i­ous organ­isms aris­ing from com­mon ances­try and is usu­al­ly reflect­ed in com­mon embry­olog­i­cal origin.Such struc­tures called homo­lo­gus organs are the con­se­quences of diver­gent evo­lu­tion and enable the organ­ism to car­ried out dif­fer­ent func­tions. Super­fi­cial­ly, they look dif­fer­ent. the study of homolo­gies is a major aspect of […]

The most impor­tant cur­rent the­o­ry for the ori­gin of the uni­verse is the Big Bang The­o­ry. accord­ing to this the­o­ry, the uni­verse start­ed with the huge explo­sion. It was not an explo­sion like the ones with which we are famil­iar with start from a def­i­nite cen­tre and spread out. it was an explo­sion which occurred

Amoe­boid move­ment is the most basic type of move­ment and per­haps the least under­stood. it refers to the char­ac­ter­is­tic crawl­ing move­ment of some pro­tists( Pro­to­zoa), Slime moulds and some­what break cell such as white blood cells. This crawl­ing move­ment is also seen in the ver­te­brate kupf­fer cells in the liv­er ‚metas­ta­siz­ing can­cer­ous cells, in ani­mal cell

Water is dis­trib­uted across var­i­ous region of earth. Oceans cov­er rough­ly 70% of the area of the earth, They reflect blue light and hence the earth appears blue from space.Therefore Earth is also referred as blue plan­et. the total vol­ume of water on Earth is esti­mat­ed at 1.386 bil­lion km3 . (333million cubic miles). Out

Types Of Soils The soil have been dif­fer­en­ti­ate it into dif­fer­ent types depend­ing on the basis of pay ver­i­zon and rela­tion­ship with the par­ent rock. Resid­ual soils :- The soils are formed at the same side where the weath­er­ing of the par­ent mate­r­i­al takes Place That is formed under in-situ con­di­tion from under­line rocks.In India the soils