2025 ALREADY GRADED A+ SOLVED, Exams of Nursing
how do worms contribute to nutrient cycling
when burrowing, nutrients are agitated and suspended to currents
how do worms contribute to the food chain
feed on material too small for most organisms and get them back into the food chain
how do worm habitats assist ecosystems
there are symbiotic relationships with other species to let them also use their habitat
what are the 2 other kinds of marine worms
chaetognatha and hemichordates
what are chaetognatha
tropical carnivorous arrow worms that have grasping spines to latch and inject
tetrodotoxins into prey
what do chaetognathas consume a lot of
zooplankton/copepods
what are hemichordates
sessile burrowing acorn worms that use a proboscis for food capture and feed by
deposition or filtering
,What kingdom are sponges and worms apart of
animalia
what are the characteristics of the animalia kingdom
multicellular, eukaryotic, no cell walls, heterotrophs, mostly mobile
what are the kinds of symmetry
radial and bilateral
what is radial symmetry
body parts are arranged in a circular pattern around a central axis
what is bilateral symmetry
body parts are arranged in a way that only one plans through an axis will provide
similar halves
what are the kinds of suspension feeding
sieving, direct interception, inertial impaction, gravitational deposition, diffusional
deposition
what is sieving suspension feeding
multiple filter elements are close together that filter particles from the water column
, what is direct interception suspension feeding
the organism is in direct water stream and food happens to come into contact on top
of a filter element
what is inertial impaction suspension feeding
the particle is denser than fluid and has so much momentum it leaves the streamline
and crashes onto the filter element
what is gravitational deposition suspension feeding
when a particle is in a steamline and falls out onto the filter element due to gravity
what is diffusional deposition suspension feeding
the particle is so small it bounces on other water molecules and hits the filter element
by diffusion
what is the scientific term for sponges
porifera
are porifera radial or bilateral
asymmetrical, aren't radial or bilateral
where do porifera live
epifauna, on top of substrate