A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
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  • Juniper
  • Pine
  • Spruce
  • Fir
Which of the following characteristics will most likely be helpful in identifying a butterfly using a dichotomous key?
  • Migrates north every spring
  • hangs on branches
  • flutters wings fast on hot days
  • Wings have long extensions
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
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  • Coleoptera
  • Heteroptera
  • Diptera
  • Lepidoptera
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
sc-10 sb-7-Dichotomous Keysimg_no 111.jpg
  • Coleoptera
  • Heteroptera
  • Diptera
  • Lepidoptera
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
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  • Whip Scorpion
  • Wind Scorpion
  • Daddy long legs
  • Scorpion
An illustration and a dichotomous key are given. What is the correct classification for this organism?
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  • Class Insecta
  • Order Amblygygi
  • Order Araneae
  • Order Scorpiones
A labeled diagram of a fiddler crab is provided. Which of the following is an accurate observation of the structures of a fiddler crab? Fiddler crabs have -
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  • five pairs of walking legs on each side.
  • an enlarged propodus on both front legs.
  • a pair of eyes on stalks at the top of the body.
  • two pairs or chelipeds for a total of four.
A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish betweenarachnids and insects?
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  • Jointed legs
  • Body segments
  • Presence of eyes
  • Presence of antennae
What step do we always start with when using dichotomous keys?
  • 1
  • 2
  • 3
  • 4
What is a dichotomous key used for in science?
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  • To organize biomes
  • Classify organisms
  • Identify bacteria only
  • None of these
Using this dichotomous key, identify the name of the circled Fish, J.
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  • peacock flounder
  • band-tail puffer
  • trumpet fish
  • spotted goat fish
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
sc-10 sb-7-Dichotomous Keysimg_no 118.jpg
  • Whip Scorpion
  • Wind Scorpion
  • Daddy long legs
  • Scorpion
Tool used by a taxonomist to identify an unknown organism is a:
  • dichotomous key
  • binomial nmenclature
  • scientific name
  • binomial key
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