Marine flatworms and planarians are ______ in mostly aquatic environments, while tapeworms and flukes are ______, living within a host animal.

Marine flatworms and planarians are ______ in mostly aquatic environments, while tapeworms and flukes are ______, living within a host animal.

It is defined as the variability among living organism in the terrestrial, marine, and other aquatic resources of the Earth.

Sponges are most accurately described asa) marine predators.b) marine filter feeders.c) freshwater scavengers.d) aquatic filter feeders

Mostly marine animals with radial symmetry, two germ layers, and stinging cells are called ______, which include jellyfishes, hydras, corals, and sea anemones.

iii. In addition to excess nutrients and thermal pollution, identify one other nonpoint source pollutant of aquatic environments.