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An organism's complexity is mainly dictated by the genes present. This may also be influenced by the DNA present to a certain extent.
The combination of an organism's habitat and its role in that habitat is known as its ecological niche. This concept describes how an organism interacts with its environment, including its physical surroundings, resources, and the other species present. Understanding an organism's ecological niche is essential for studying its impact on the ecosystem and predicting how changes in the habitat may affect the organism.
An organism made of one cell which may or may not have a nucleus is called a prokaryote. Examples of prokaryotes include bacteria and archaea.
Yes, water is present on Mars in the form of ice. There are polar ice caps on Mars that consist of water ice and observations suggest the presence of subsurface water ice as well. Additionally, liquid water may exist temporarily in some regions on the surface.
The compactness of molecules in matter for a given organism refers to how closely packed the molecules are within the organism's cells and tissues. It can vary depending on the specific structure and composition of the molecules present, as well as the organism's evolutionary adaptations and environmental factors. Generally, organisms with more complex structures or higher densities of certain types of molecules may exhibit greater compactness.