As a scientist I feel a bit guilty when I write things on politics, religion etc. I Feel much better when I write articles on general science or wellness. This is an article I intend to post for children to introduce them to the living world.
According to definition a living organism is a system that is capable of reacting to stimuli, reproduction, growth and maintenance as a stable whole. Over the last few decades many new terms have been added to qualify a particle to be living.
Classification of Living world:
The living world is broadly classified into 2 categories:
1. Pro-karyotes(pro- primitive, karyon - nucleus)
2. Eu-karyotes
Pro-Karyotes:
These groups of organisms have a very primitive nucleus in their cells. The nucleus of these organisms have no well defined membranes, nor do they have any membrane bound structures inside the cell. The prokaryotes often represent bacteria and archaea. Often there is very little difference between archaea and bacteria but metabolically they have some striking difference to put them into separate groups. Both archaea and bacteria are single celled organisms but may colonize. Bacteria and archaea often have members that can grow in extreme conditions such as higher salt concentrations, hot springs etc. They have certain enzymes that are biologically active at odd temeratures, pH, so they are economically very important. Majority of bacteria are known to cause disease in humnas and other higher life forms.
Eu Karyotes:
Eu Karyotes are a large group of organisms with complicated cellular structure. Each eukaryotic cell has several membrane bound structures such as nucleaus, mitochondria, chloroplasts, golgi apparatus, lysosomes, dictyosomes etc. to carry on several metabolic functions. Eukaryotes are often multicellular and they range from simpler forms like Amoeba to complex creatures like humans.
According to definition a living organism is a system that is capable of reacting to stimuli, reproduction, growth and maintenance as a stable whole. Over the last few decades many new terms have been added to qualify a particle to be living.
Classification of Living world:
The living world is broadly classified into 2 categories:
1. Pro-karyotes(pro- primitive, karyon - nucleus)
2. Eu-karyotes
Pro-Karyotes:
These groups of organisms have a very primitive nucleus in their cells. The nucleus of these organisms have no well defined membranes, nor do they have any membrane bound structures inside the cell. The prokaryotes often represent bacteria and archaea. Often there is very little difference between archaea and bacteria but metabolically they have some striking difference to put them into separate groups. Both archaea and bacteria are single celled organisms but may colonize. Bacteria and archaea often have members that can grow in extreme conditions such as higher salt concentrations, hot springs etc. They have certain enzymes that are biologically active at odd temeratures, pH, so they are economically very important. Majority of bacteria are known to cause disease in humnas and other higher life forms.
Eu Karyotes:
Eu Karyotes are a large group of organisms with complicated cellular structure. Each eukaryotic cell has several membrane bound structures such as nucleaus, mitochondria, chloroplasts, golgi apparatus, lysosomes, dictyosomes etc. to carry on several metabolic functions. Eukaryotes are often multicellular and they range from simpler forms like Amoeba to complex creatures like humans.
No comments:
Post a Comment