They are considered to have originated from cyanobacteria through endosymbiosis—when a eukaryotic cell engulfed a photosynthesizing cyanobacterium that became a permanent resident in the cell
Answer:
element Y and Z
Explanation:
Having on valence electron indicates that these elements are on the same column/group of the periodic table. Both these elements will bond with a -1 charge.
<span>the variety of life in the world or in a particular habitat or ecosystem.
examples would be like a group of animals living on a farm or a family in a house.
but if ur meaning "megadiverse" would be like humans inhabiting the earth. or the ocean full of marine life</span>
Answer: Your friend has suffered a Second Degree burn.
I believe that it’s answer A and C