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43 Cards in this Set

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  • Back
What are the subphyla of phylum arthropoda?
subphylum cheliceriformes
subphylum myriapoda
subphylum hexapoda
subphylum crustacea
centipedes and millipedes are in subphylum
myriapoda
arachnids are in subphylum....
cheliceriformes
insects are in subphylum
hexapoda
sea spiders are in subphylum
cheliceriformes
crabs and lobsters are in subphylum...
crustacea
horseshoe crabs are in subphylum...
cheliceriformes
shrimp are in subphylum
crustacea
how many living species of horseshoe crabs are there?
4
sea spiders are what type of eaters?
carnivores, suck tissues directly with probiscus
true or false: sea spiders have no specialized respiratory or excretory systems
true
how do horseshoe crabs mate?
Atlantic Horseshoe Crabs mate in early spring, at high-tide lines (especially on a full moon tide). The larger female releases a pheromone to attract the male. The male grabs onto the female via his specialized pinchers. The female moves to the highest point of the tide and digs a hole half a foot deep. Into this hole she releases 200 blue-gray tiny eggs. Along with the eggs she releases another pheromone that causes the male to release sperm. The eggs are then covered by the incoming tide and the two organisms "unlatch" and go their separate ways.
how are horseshoe crabs "living fossils"?
little has changed in hundreds of millions of years

surviving members of a rich diversity of cheliceriforms that once filled the seas
what are the pedipalps (appendages) on arachnids used for?
feeding or reproduction
where is the poison in arachnids?
on the movable fang of the chelicerae
how does respiration work in arachnids?
tracheae or book lungs (stacked platelike structures contained in an internal chamber)
which organs of the spider secrete silk?
spinnerets
what type of eaters are arachnids?
carnivores, liquefy food before ingesting
how do cheliceriformes differ from the three other subphyla with regards to antennae?
cheliceriformes have no antennae
other three subphyla have one pair antennae
how do cheliceriformes differ from the three other subphyla with regards to chelicera
cheliceriformes have chelicera
other three subphyla don't
how do cheliceriformes differ from the three other subphyla with regards to eyes
chliceriformes have simple eyes
other three have compoud eyes
how do cheliceriformes differ from the three other subphyla with regards to mouthparts
subphylum cheliceriformes have no mandible
other three subphyla have mandibles
how do cheliceriformes differ from the three other subphyla with regards legs
subphylum cheliceriformes has 4 pairs of walking legs

other three don't
what are the two classes of subphylum myriapoda?
class chilapoda
class diplopoda
myriapods have _____ uniramous/biramous appendages
uniramous
chilapods have ___ pair(s)legs/segment
1
diplopods have ___ pair(s) legs/ segment
2
which class of myriapods roll up?
diplopoda
(some roll up when threatened)

chilapods never roll up
which class of myriapods are fast?
chilapoda

diplopods are slow
how do chilapods fight/catch prey?
strike out with poison claws and paralyze prey
how do diplopods defend themselves?
repugnatorial glands release irritating fluid/ defensive chemicals
hexapods are in every habitat except
the deep sea
what are the three tagmata of hexapods?
head, thorax, abdomen
hexapods:
_ pr legs
_ pr wings
_ pr antennae
3
2
1
hexapods have uniramous/biramous appendages?
uniramous
true are false: there are no appendages on a hexapod's stomach
true
gas exchange in a hexapod occurs by
independent tracheal system
true or false: circulatory system in a hexapod transports O2
false
hexapoda incomplete metamorphosis
young/nymphs resemble adults but are smaller, have different body proportions and lack wings

nymph undergoes a series of molts, each time looking more like an adult

final molt: insect reaches full size, acquires wings, and becomes sexually mature
insects who undergo incomplete metamorphosis
grasshoppers and some other insect groups
90% of all insects undergo ____ metamorphosis
complete
complete metamorphosis
larval stage specialized for eating and growing, looks entirely different from the adult stage, which is specialized for dispersal and reproduction

pupal stages between larval and adult stage
advantage of complete metamorphosis
larvae and adults do not compete for resources