YourStory | First-Person K12 Education

What is the primary source of energy for most aquatic ecosystems?

Solar energyChemical energy from hydrothermal ventsDecomposing organic matterWind energy

Which of the following best describes a keystone species?

A species that has a large population in an ecosystem.A species that has a disproportionate effect on its environment relative to its abundance.A species that is introduced to an ecosystem and disrupts it.A species that requires specific environmental conditions to survive.

Which process is primarily responsible for the cycling of nutrients in aquatic ecosystems?

PhotosynthesisEutrophicationDecompositionOsmosis

Assessment

What is the primary source of energy for most aquatic ecosystems?

Which of the following best describes a keystone species?

Which process is primarily responsible for the cycling of nutrients in aquatic ecosystems?