According to a source the answer is <span><u>Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.</u>
These cyanobacteria species were the first ones to "produce" oxygen as a by-product of the photosynthetic mechanisms which enables organisms to make their own food. </span>
The cells make up tissues and they make up organs and the organs make up organ systems
Answer:
change within a cell
Explanation:
In biology, depolarization is a change within a cell, during which the cell undergoes a shift in electric charge distribution, resulting in less negative charge inside the cell. Depolarization is essential to the function of many cells, communication between cells, and the overall physiology of an organism.
Answer:
A
Explanation:
It can't be B because during mitosis, sister chromatids inevitably are separated. It can't be C because they are copied so they have the same instructions and know what to do. A is the best choice.
