And today's question.

How do we get from this

to this?

What we already know

Bioelements join to make biomolecules; there areĀ four groups of biomolecules.

Respiration

This came first - it is the release of energy from chemical ingredients.

Chemotrophs

Text

What problems can you see with this?

Then cyanobacteria

Photosynthesis

from 'photo' meaning light, and 'synthesis' meaning making or manufacturing

or 'making things from light'

ThenĀ 

Respiration

in animals

Properly called

'cellular respiration'

Occurs in mitochondria

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