Final Exam - True or False Section Flashcards
Phoronids often crawl out of their tubes and deposit feed on the surface of the mud.
False
Spoon worms (Echiurans) often suspension feed by elevating their proboscis up above the bottom.
False
Podocytes are cells that gather wastes from the bloodstream and empty the wastes into the coelomic fluid.
False
Pedicellariae are pinchers that sea stars use to grab their prey and cut them open.
False
Fossil echinoderms were all pentaradial, just as modern living echinoderms are.
False
Bryozoans have a lengthy fossil record dating back many hundreds of millions of years.
True
Arthropod fossil trilobites have been encountered which show molting in process (mid-way through).
True
An extensive fossil record of segmented Annelid worms dates back over 500 million years.
True
Brachiopods use a hinge ligament to open their shell valves, just like bivalves do.
False
The larvae of all Bryozoans feed in the plankton for weeks, and hence are planktotrophic.
False
Some Bryozoans (especially those in the Class Stenolaemata) clone their embryos via a process called polyembryony.
True
The phylum Bryozoa used to be known as the phylum Ectoprocta, because their anus is at the center of their circular lophophore.
False
All Bryozoan species are polymorphic.
False
Inarticulate brachiopods often speak to the public, but are not good at doing so.
False
All lophophorate phyla living today are clearly and unequivocally evolved from a single common ancestor.
False
All sea cucumbers are suspension feeders.
False
Some brittle stars are surface deposit feeders.
True
Most sea stars are predators.
True
All sea star species are keystone species.
F
The madreporite of a sea cucumber is located internally.
True
Statoblasts, in freshwater Bryozoans, are very reminiscent of the gemmules of freshwater sponges.
True
Brittle Sea Stars (Ophiuroidea) always use tube feet for slow and steady movements.
False
The madreporite in echinoderms is where water enters their water vascular system.
True
Sea Star Wasting Disease (SSWD) can be prevented by boiling the viruses in the water it lives in, to kill them.
False
Sea cucumbers breathe through their anus.
True
All Echinoderms are pentaradially symmetrical in each of their life stages (adult & larva), with few exceptions.
Lophophores are homologous to the gastrozooids of certain hydrozoans.
False
All colonies in the class Gymnolaemata are polymorphic.
False
Brachiopods have muscles that open and close their shell valves.
True
Chitons have calcareous spines along their girdle and have no sensory organs to detect light.
False