Here something that might help
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Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
I hope this counts - cell wall! helps keep most materials out but allows specific materials to pass through. animal cells do not have a cell wall
Nervous system is the body system that is involved in coordinating and controlling body movements
Answer:
Fish is a species that has a spine. Although other species in that list have spines, fish is a representative vertebrate example when learning about them.
Explanation:
A vertebrate is a species that has a spine / multiple vertebrae.
<em>(I'm sorry if this was not the answer you're looking for)</em>
Answer:
Cloning technology
Explanation:
With cloning technology we can replicate and combine different genes to study, save lives, and create new species
