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Which of the following best describes this organism?

Barnacles are anchored to rock in the intertidal zone and do not move from this location once they are adults. Therefore, they are

In this food chain the mouse is a(n)

Which of the following organisms is mismatched with its trophic level?

If there were an additional trophic level that consisted of organisms that prey on snakes, about how much energy would be available to organisms at that trophic level?    

Chloroplasts most likely evolved from _____________.

__________ include all organisms (algae, animals, and bacteria) that drift with ocean currents.

Lobed fins should be designated at which position on the phylogenetic tree?   Amphibians Ray-finned Fishes Lobe-finned fishes Lampreys Reptiles Mammals Sharks and Rays Jaws 1 1 1 0 1 1 1 Amniotic Egg 0 0 0 0 1 1 0 Legs 1 0 0 0 1 1 0 Lobed fins 1 0 1 0 1 1 0 Milk Production 0 0 0 0 0 1 0 Lungs 1 1 1 0 1 1 0

The scientific study of the diversity of organisms with the purpose of deriving their evolutionary relationships is called _____.

Coral reefs are located