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Earth Science c/o crayfish

A crayfish lives in a shallow pond along with frogs, turtles, various insects and small fish.  Meadowsweet grows on the banks of the pond, which is rimmed with grasses and reed?  The pond would be considered the crayfish's?
 
a.  habitat
b.  niche
c.  home range
d.  territory
 
2.  the crayfish scavenge for dead fish and decayed vegetation at the bottom of the pond.  this decribes the crayfish's?
 
a.  habitat
b.  niche
c.  home range
d.  territory
 
3.  the fact that the crayfish feed at the bottom of the pond while tutles feed towars the top of the pond is an example
 
a.  stratification
b.  symbiosis
c.  carrying capacity
d.  home range
 
4.  scientists have carried out experiments in which they tag crayfish with microchips to study their movements throughout the day.  in studying their movements, the scientists are studying the crayfish's?
 
a.  habitat
b.  niche
c.  home range
d.  territory
 
5.  crayfish like to hunt at night and hide during the day in caves or burrrows they create, often under rocks or in the shelter of a pond or river bank.  crayfish are, therefore
 
a.  diurnal
b.  nocturnal
c.  crepuscular
d.  arboreal
 
6.  crayfish will aggressively defend their home.  in defending the area around their burrow or cave, crayfish are defending their
 
a.  habitat
b.  niche
c.  home range
d.  territory
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