Describe the organism that scientists believe was responsible for changing the composition of the early atmosphere. what is it called and how did it change the atmosphere? why was this change to the atmosphere so important? enter your answer in the space provided.

Scientist believe that organisms known as cyanobacteria, or blue-green algae are responsible for changing the composition of the early atmosphere. ...

Explanation:

These microbes conducted photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and the what's most important : oxygen. These ancient organisms produced oxygen becoming a significant component of Earth's atmosphere. That is the reason why change is so important.

a, i am pretty sure.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.