T/F Exoskeletons can be extended and retracted.
False, jointed appendages can be extended and retracted
The fulcrum for the leverage of movement is provided by what arthropod feature?
Specialized body regions consisting of several fused segments i
What are hemolymphs?
No distinction between circulating and extracellular fluid.
Where is the heart in arthropods?
Dorsal thorax and abdomen
The mouth, pharynx, esophagus, crop, and gizzard are called make up what
What makes up the nervous system, in arthropods?
Anterior brain + ganglia on ventral surface
What carries out body functions if there is no brain in arthropods?
What are ommatidia?
Many independent visual units.
Compund eyes are composed of what?
T/F Most arthropods undergo metamorphosis.
What factors do arthropods owe their success to?
The main advantages arthropods possess that allow them to pass on their genes
are exoskeletons, jointed appendages, specialized body regions, and
Malphigian tubules are used by what organisims in the excretory system?
Terrestrial insects, myriapods, and chelicerates
What are projections from the digestive tract in arthropods?
T/F Most arthropods are hermaphroditic.
False, most a
What phylum has the 1st, 2nd, 3rd most species in it?
1st: Arthropoda. 2nd: Mollusca. 3rd: Chordata
What type of animals make up the highest percentage of arthropods?
How many insects are there?
Over 1 quadrillion
What do arthropods compete with
T/F Gills allow organisms to breathe out of water as long as they are moist.
False, book gills allow organisms to breathe out of water if they are moist.
What are book lungs?
Leaf like plates where air into which air is drawn and from which it is expelle
Do bryozoans live in colonies or solitary?
Describe how bryozoans move?
They are sessile
Where is the anus in bryozoans?
Near the mouth
What are zooid?
What are zoecium and how do they come about?
They are chitinous chambers
What are chelicerae?
Pincers/fangs that act as feeding organs
How many tagmata do chelicerata have? Give their specif names.
2, prosoma(cephalothorax) and opisthosoma(abdomen)
What are pedipals used for and in what class?
Used as copulatory organs, pince
What medical purpose are leeches used for?
Remove excess blood that accumulates within tissues as a result of injury or
What uses hirudin and what is its function?
Leeches use hirudin which is a peptide that prevents blood from clotting.