Zoology Test 3 Flashcards
Characteristics of typical annelids are
segmentation, a closed circulatory system, and metanephridia
setae are:
hair like bristles and a synapomorphy of annelids
in contrast to Nematodes, how do Oligochaetes elongate? (stretch lengthwise)
they contract their circular muscles
annelids that are direct deposit feeders live:
in the substrate (sand or soil)
hirudineans are unlike other annelids in that:
they have no setae
the polychaetes:
belong to the largest and most diverse class of annelids
Polychaetes crawl by a means of _____ which may also serve in respiration:
parapodia
characteristics typical of arthropods are:
segmentation, open circulation, and Malpighian tubules
The chelicerae that give the Chelicerata its name are:
derived from the first pair of appendages
spiders breathe by means of:
book lungs
merostomates breathe by means of:
book gills
relative to merostomates, the arachnids and crustaceans show:
highly specialized appendages
primitive crustaceans, such as Cephalocarida have:
many similar appendages
subclass cirripedia (barnacles) are different from all other crustaceans you have studied because:
they secrete a calcareous shell, are sessile, originally classified as molluscs, and are suspension feeders
the exoskeleton of most terrestrial arthropods:
prevents water loss
why is the respiratory apparatus of a crayfish covered by the carapace?
to protect them from clogging and damage
the crustacean order that has been most successful invading terrestrial environments is the :
isopoda
all marine crustaceans share:
the nauplius larva during development
members of chilopoda:
are active predators
insect wings operate by:
either attaching to the wing directly or moving the wing by distorting the thoracic components
disadvantage of insect development where juvenile forms are similar in appearance, but smaller than adults?
they must compete for the same food resources
Thysanurans (silverfish) and collemolans (springtails) both lack wings:
because they never evolved wings and are both primitive hexapods
In 1753 Linnaeus described a type of speciment of the Asian Elephant. Recently however, zoologists were able to determine that the specimen Linnaeus described was actually that of the African Elephant and corrected a 300 year old mistake. How did they confirm this?
They extracted protein from Linnaeus’ specimen and subjected them to phylogenetic analysis
