Examples are: assimilation of foods and respiration.
Biochemistry.
from chemicals in the ocean
All living organisms have a very complex chemistry.
how unicellular organism survive
All living organisms need water to survive, because they have cells. With air, not all living organisms need air. Some forms of bacteria do not need oxygen to live, and others can't stand oxygen.
the struggle between organisms to survive as they attempt to use the same limited resource the struggle between organisms to survive as they attempt to use the same limited resource
Biochemistry.
Obligate aerobes are organisms that require oxygen to survive, as they use it for their cellular respiration process. These organisms cannot grow or survive in environments with low oxygen levels. Examples include humans, most animals, and many bacteria.
Chemistry not involving living organisms
The humankind cannot survive without chemistry.
The cyst enables many organisms to survive in the environment for long periods of time without need for food or water
photosynthesis helps organisms survive by providing them with oxygen to breathe.
from chemicals in the ocean
All living organisms have a very complex chemistry.
Just view it as applied mathematics - dont worry about the chemistry.
Organisms survive because they are organisms. Inorganic matter does not survive or live. They get materials from the outside-like gas, food, etc.
Biochemistry is a chapter of chemistry; biochemistry is the chemistry of living organisms.