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What are the three respiratory or gas exchange structures in arthropods? Name which subphylum goes with each.
- Tracheal system - uniramia (insects, centipedes+milipedes)
- Book lungs - Spiders (Chelicerata)
- Gills - Crustacea
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What is a tracheal system? What animal has this system?
- Extensive network of thin-walled tubes that branch into every part of the body.
- Insects.
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All arthropods have ____ circulatory systems. That means they have no ____ or _____ of _____ .
- open veins
- separation
- fluids
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What is ecdysis? How does it happen?
Molting. Enzymes dissolve old cuticle. Animal swallows water-- increased blood value. Cuticle splits and animal pulls itself out of its exoskeleton. Hides until new shell hardens.
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Complete metamorphosis? Example?
- egg -> larva -> pupa -> adult
- ex: egg -> caterpillar ->chrysalis -> butterfly
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Incomplete metamorphosis? Examples?
- egg -> nymph -> adult
- ex: mites, grasshoppers, cockroaches
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Direct development? examples?
- egg -> juvenile -> adult
- ex: crayfish. young look like adult.
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Arthropods have ______ exoskeletons.
chitinous
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Arthropoda are segmented but they do not have ________
septa
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Arthropods have reduced competition through _________
metamorphosis
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One difference of Arthropods from annelids: the absence of ________
cilia
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examples of each subphylum:
Chelicerata -
trilobita -
crustacea -
uniramia
- arachnids, scorpions, horseshoe crabs, mites, ticks
- trilobites
- crayfish, lobsters, isopods
- insects, centipedes, millipedes
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How many appendages do chelicerates have?
Chelicerata have 6 pairs of appendages
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What subphylum has pedipalps?
Chelicerata
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What is the tagmata of spiders and crustaceans?
cephalothorax and abdomen
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What is the tagma of uniramians?
Head, thorax, abdomen
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Which subphylum uses antennal or green glands? What are these glands used for?
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What is the malpighian tubes used for? Which animal uses it?
Excretion. Spiders
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Difference between centipedes and millipedes?
pairs of legs per segment?
carnivore or herbivore?
poison?
lay eggs?
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What is the cheliped? Which subphylum has this appendage?
first walking leg, has a claw. Crustacea
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Excretion of nitrogenous wastes occur by _______ in _______ and ___________
- diffusion
- gills
- across thin areas of the cuticle
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What is a vector of Lyme disease? Curable?
- Ticks (Chelicerata)
- Yes (antibiotics)
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What is the oldest ancestral and most widely occuring larva in Crustaceans?
nauplius. (planktonic, move in shore to develop)
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Circulatory system of crayfish: Small, angular ____ that lies in the _____ _____, and enclosed in ________. Blood leaves heart in arters but returns by ______. 3 pairs of ______, which are ___________.
- heart
- pericardial sinus
- pericardium
- sinuses
- ostia
- opening of the heart that receive hemolymph
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Arthropod's exoskeleton vs cuticle of annelids.
Exoskeleton = contains ______, goes through ______
Cuticle = made of ______, doesn't ____
- chitin, ecdysis
- collagen, molt
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Advantanges of joined appendages?
Efficiency and better locomotion
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Function of antennules in crayfish? ______, _____, and ______
touch, taste, equilibrium
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