Some are similar to plants in that they use H2O and produce oxygen as a byproduct of photosynthesis.
(Some; are; similar to plants in that they use H2O and produce oxygen as a byproduct of photosynthesis) (they; use; H2O) (they; produce; oxygen; as a byproduct of photosynthesis)
Some they they
are use produce
similar to plants in that they use H2O and produce oxygen as a byproduct of photosynthesis
H2O
oxygen as a byproduct of photosynthesis