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A relative of the sea star, the crinoid has feathery plumes which are well
designed to filter plankton from the water. Numerous worms and shrimp remain
on the plumes where they pick bits of food from the filtering apparatus. Some
Most filter feeders must maintain a current of water through their bodies in order
to filter food. Often this water movement is generated by beating cilia — hairs that
are capable of moving. The cilia work perfectly to cause this movement, but are ...
When the tiny plants undergo this algal bloom, they are eaten in enormous
quantities, especially by filter feeders — invertebrates such as oysters, clams,
and mussels which draw in large quantities of water and filter that which is
digestible for ...
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I purchased all three books in this set and taught a short course to a small group of high school kids. We had a great time with this course! We did 10 experiments and held very intense all-day ... Read full review