The electron degeneracy pressure keeps white dwarf stars from collapsing in on themselves.
What do you mean by "What is a shooting star, a comet or a meteor burning in our Earth’s Atmosphere?"
edit: ohhhhh you are asking what a shooting star is...
its particles of comets or astoroids/metor enter the atmosphere at very high speeds and burn up
Answer:
1.embryophyta
2.moss is a green flowerless plant that lack roots
3.found in moist shady
4.
<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.
They are the basic units of structure because they are the smallest unit of life. you cant go any further. also they make up every living thing from prokaryote to eukaryote.
