Answer:
The condition of the Earth had to become favourable before it could support any form of life.
The formation of the different layers around the earth like the ozone layer was necessary before life could originate. Primitive species such as some prokaryotes were able to live in hydrothermal conditions during the initial times. With the passage of time, as the concentration of oxygen increased due to photosynthetic prokaryotes, situations became favourable for eukaryotic organisms to arise.
Urine is stored in the D. URINARY BLADDER before elimination.
Urine is excreted from the kidneys, it travels from the kidneys to the bladder through ureters. It exits the bladder through the urethra.
Self replication of living cells occurs by the catalytic action of Proteins.
The biological process that results in the creation of an exact or comparable clone of itself is known as self-replication. DNA replication takes place during cell division and can be passed on to progeny during reproduction.
Proteins are the main metabolites used as the catalyst in the biological and chemical reactions. Enzymes made up of protein has main role in enzyme catalysis, which decrease the activation energy, thus increase the rate of reaction.
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