On week 3, we began to learn about the history of life. We studied about the the first cells or more likely what the first thing existed in this world. We know that there are billions or more humans, animals and plants existed in the world we lived. But do you ever curious what it all began with ?
Based on fossil record, the age of earth was approximately 4.9 billion years old while the diversification of life started 3.9 billion years ago. It means 1.1 billion years needed for the chemical and molecule to accumulate and react. And me ? Yes I 19 years old :p Need to learn more, dude !
Origin of life produced from non-organic matter ( chemical evolution ) on a pre-biotic earth. Then the original life evolved into more complex life and we called this process as natural process of random mutations and natural selection. In a chemical evolution, there are 4 requirements have existed which is :
- - Little or no free oxygen
- - Source of energy to form organic molecules
- - Availability of chemical building blocks
- - Sufficient time for the molecules to accumulate and react
Basically this is the origin of life time line :
Not just that, I learn about classification. About kingdom and else. ( actually i have learned in my matriculation but this is quite simple as we only studied about the kingdom )
There are 6 kingdoms which is :
Kingdom Archaebacteria and eubacteria
- unicellular and prokaryotic
Kingdom Protista
-unicellular/multicelluar and eukaryote
-Autotrophic/Heterotrophic
Kingdom Fungi
-Mostly multicellular
-Eukaryote
-Heterotrophs
Kingdom Animalia
-Heterotrophic
-Multicellular
-Eukaryotic
Kingdom Plantae
-Autotrophic
-Multicellular and eukaryotic
Last but not least, classification is very important as it help us to clarify relationships among organisms, remember organisms and their traits, enabale us to communicate clearly the identity of organisms being studied.
I cant wait to learn new chapter; Cell Theory and prokaryotes. See again ! Thank you.
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