Answer:
Abiotic
Explanation:
They aren't a living organism so it's abiotic I assume.
Answer:
The circulatory system
Explanation:
The heart, veins and arteries works together to service the cells of the body
I believe those are both non-contact forces bc it's not something physical
<u>Answer:</u>
Cyanobacteria start producing pure oxygen around 200 million years ago.
<u>Explanation:</u>
Many scientists believed that Earth did not have any oxygen. Cyanobacteria or the blue green algae are the microbes which produced oxygen for the first time with the help of photosynthesis. This was around 4.5 billion years ago: after Hadean eon.
They were very simple, but they produced oxygen in the early earth’s atmosphere. So, they brought evolution on earth. This “blue-green algae” exists in salt water, rocks and soils and play a major role in maintaining the ecosystem.
There is no illustration attached, so it is impossible to answer this question. I apologise.