Simple Marine Animals And Cnidarians 1: Question Preview (ID: 21791)

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The jellyfish's umbrella-shaped structure is the ________________.
a) medusa b) polyp c) hydroid d) filter feeders
The stinging cells inside tentacles are called _______________.
a) medusa b) polyp c) cnidoblast d) zooxanthellae
An adult sea anemone lives as an attached ____________.
a) medusa b) polyp c) benthic d) larval
The name of the algae that live inside coral polyps is ____________________.
a) medusa b) zooxanthellae c) larval d) benthic
The Portuguese man-of-war is a dangerous colonial _____________.
a) medusa b) polyp c) benthic d) hydroid
Sponges often have a rigid structure due to their ____________________.
a) exoskeleton b) medusa c) larval d) polyp
An animal's early, free-living stage is called a ___________________.
a) benthic b) larval c) filter feeder d) exoskeleton
Animals that strain tiny food from the water are ______________________.
a) benthic b) larval c) filter feeders d) exoskeleton
Water is pumped out of a protozoan by its _____________________.
a) contractile vacoule b) medusa c) benthic d) exoskeleton
Bottom-dwelling organisms are referred to as ______________________.
a) medusa b) polyp c) benthic d) larval
The ameboid movement of protozoans is carried out by their
a) nematocysts b) mesoglea c) nerve net d) zooxanthellae
A jellyfish responds to external stimuli through use of its
a) spicules b) cilia c) pseudopods d) flagella
The sponge is considered a simple animal because it
a) lives on the bottom of the ocean b) lacks a high degree of specialization c) filter feeds d) is generally small
The group of marine protozoans that lack microscopic hairs is the
a) ciliates b) flagellates c) amebas d) sponges
A good place to find sponges locally is
a) ingestion b) respiration c) locomotion d) excretion
A life function carried out by protozoans but not by sponges is
a) floating on the ocean surface b) under the sand c) in the upper intertidal zone d) attached to the bottom of a wharf piling
The inability of a sponge to make rapid, reflex movements is due to its lack of
a) contractile tissue b) nervous system c) mechanisms for respiration d) method of ingestion
Protozoans are classified into three groups based on their being either ameboid, ciliates, or
a) larval b) sessile c) flagellated d) planktonic
Water and wastes exit a sponge's body through its
a) ostia b) osculum c) amebocytes d) myocytes
Inside each stinging cell of an anemone is a coiled thread with a bard at the end, called a
a) cnidoblast b) cilia c) nematocyst d) zooxanthellae
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