Answer: creating an ozone layer to shield life from UV rays
Cynobacteria or blue green algae is the strain of bacteria, which was able to produce oxygen in the primitive earth as a result of photosynthesis. The abundance of oxygen in the atmosphere formed the ozone layer in the upper atmospheric layers, these layers are protective enough to provide a shield against the harmful UV radiations incident on earth coming from the sun.
Answer: They are both large and eat plants. They also have long intestines
Hope this helped :)
Explanation:
A statement of cause and effect that can be used to set ip a test for a hypothesis is called a prediction.
Answer:
i don't know lol i can't really se it becise is like i don't know
The person who studies living things is called a biologist
