During early ages, the alkaline hot liquids from the vent met the acidic cold ocean water. the acidic ocean water produced a natural gradient across mineral wall in rocks that are rich in catalytic minerals. this difference in conditions converted and hydrogen into organic carbon-containing molecules. these can react with each other to form organic molecules, such as nucleotides and amino acids.

Explanation:

The alkaline hot liquids reacts with the acidic cold ocean water to form minerals which are in the form of salts. When the negative ion of a base react with the positive ions of an acid, salts are produced.

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602