Phytoplankton - zooplankton- small fish -mammal
This is the food chain of the organisms.
From phytoplankton,which are microorganism, they are eaten by zooplankton. Zooplankton are heterotrophic planktons such as jellyfish and forams. Next to this is small fish, they eat those zooplankton. Lastly, the mammals will eat those fish.
Tissues
Tissues are somewhat more complex units than cells. By definition, a tissue is an organization of a great many similar cells with varying amounts and kinds of nonliving, intercellular substance between them.
True. With time, effort, and the right tools, anything can be replicated.