study suggests that photosynthetic eukaryotes may have emerged around 1.9 billion years ago in freshwater habitats. Eukaryotes are thought to have evolved the capacity for photosynthesis through a process called endosymbiosis, in which a protist host encapsulated a photosynthetic cyanobacterium.
Unicellular organisms are living things made up of only one cell. For example, bacteria and yeast are unicellular. Multicellular organism are made up of more than one cell. Some examples of a multicellular organisms are humans and animals.
Answer:
Option (e).
Explanation:
Ecosystem may be defined as the system that includes all the things of the particular area. Two main component of ecosystem are living organism and non living environment.
Living component includes all the living organism. Non living component includes the chemical environment and physical environment like temperature and pressure. The interaction of both the component is involved in the ecosystem.
Thus, the correct answer is option (e).
You should move this question to Mathematics instead. Or at least physics.
