The first living cells to evolve on earth were single celled bacteria. These single celled organisms developed specialized structures to trap sunlight energy and to carry out photosynthesis e.g mitochondria, chloroplasts and lead to the development of multicellular organisms known as plants which are included in eukaryotes. All these changes have been found in fossil records of primitive organisms.
The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. To accomplish this, each strand of existing DNA acts as a template for replication.
Enzymes are biological catalysts that catalyze chemical reactions or biochemical reactions. They are substrate specific and each enzyme acts on a certain specific substrate.
<em><u>Enzymes contain a pocket-like structure called the </u></em><em><u>active site</u></em><em><u> where the substrate binds according to the induced-fit model.</u></em>
Upon binding of the substrate to the active site catalysis takes place and the substrate is converted to product. Enzymes remain unchanged after the reaction.
2. The Coriolis Effect, in combination with an area of high pressure, causes the prevailing winds—the trade winds—to move from east to west on both sides of the equator across this 60-degree "belt." ... The sinking air triggers the calm trade winds and little precipitation, completing the cycle
