The Algae. Unless you want to get into the microorganisms that contribute to the algae's growth.
Answer:
During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. ... The other type of cell division, meiosis, ensures that humans have the same number of chromosomes in each generation.
Explanation:
First option:
Ecosystem --> population —> community —> organism