Procaryotes to eucaryotes, Biology

PROCARYOTES TO EUCARYOTES

Procaryotes are the simple, unicellular organisms which do not have well defined nucleus, whereas eucaryotes are the complex;multicellular organisms with well defined nucleus. Procaryotes were originated about three and a half billion years ago, whereas eucaryotes originated about one and a half billion years ago. Thus, it appears that eucaryotes evolved later than the procaryotes. But in biochemical details the procaryotes and eucaryoteb are very similar. Therefore, we can say that they have a common origin. Eucaryotes, like procaryotes. have the same biochemical pathways for respiration both anaerobic and aerobic and for photosynthesis. The eucaryotes not only attained larger size and complex structure but also developed into multicellular organisms. Earlier each form of cell which was thought as an autonomous arid self-sufficient unit, gradually became dependent on each other in larger organisnis leading to division of labour within organisms. This type of cooperation between cells eventually led to the development of higher forms of life as they exist today.

Posted Date: 12/9/2012 11:45:21 PM | Location : United States







Related Discussions:- Procaryotes to eucaryotes, Assignment Help, Ask Question on Procaryotes to eucaryotes, Get Answer, Expert's Help, Procaryotes to eucaryotes Discussions

Write discussion on Procaryotes to eucaryotes
Your posts are moderated
Related Questions
How is excretion done in fishes? Fishes have a pair of kidneys that filtrate the blood. Bony fishes excrete nitrogen as ammonia, NH 3 , (they are ammoniotelic) and cartilagino

What pathway does dietary iron follow in blood vessels

Describe Class Agnatha in details? Class Agnatha takes its name from the Greek word "gnathos," which means jaw, and "a," which is the prefix for "without." These jawless fishes


As the functions of individual genes become known, the power of this new biology can be used to change organisms in predictable and desirable pathways.  Organisms which have been c

Explain Differential Media - Culture Media? It allows differentiation among morphologically and biochemically related group of organisms. It contains certain ingredients which

which hormone is secret in salivary gland?

Activated carbon has a much higher adsorption capacity than other materials. Carbon adsorbs objectionable odours, flavours, organic compounds and many hazardous chemicals. There

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Q. Explain Cardiac calcification? Pericardial Calcium is most dense in the atrioventricular grooves and is seen as thick oblique circles or arcs of calcification. From th