I think the correct answer would be strong gravity. The factor that allows the earth to hold onto water would be the strong gravitational pull of the earth. In fact, it is what holds everything onto earth not only water. Hope this answers the question.
Well it wouldn’t lead to the development to a completely new species but it would cause the organisms in that are evolved to adapt to their current situations so the answer would be evolution is any at all
<span>Pond organism is unicellular and crab is multi cellular.
The simplest level at which life exist is called the cell. Unicellular organism contain only one cell while multi cellular organisms contain more than one cell. Multi cellular organisms can be organized into various levels such as Cells>tissues> organs>organ systems> organism. Thus pond organism is unicellular under microscope and crab is multi cellular.</span>
The illustration is missing the type of organisms known as decomposers. They break down dead animals and plants and have the vital role in returning the nutrients back into the system, where they can be used once more by the primary producers.
In the illustration:
The primary producers are the phytoplankton.
The primary consumers are the: krill, cod and zooplankton
The secondary consumers are the remaining species that feed on the primary consumers.
