Science TEKS

A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between
arachnids and insects?

When using a dichotomous key to identify organisms, what do we look at?

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?

What is a dichotomous key used for in science?

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?

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

Tool used by a taxonomist to identify an unknown organism is a:

An illustration and a dichotomous key are given. What is the correct classification for this organism?

A botanist discovers a new plant in the jungle. Which of the
following observations of the plant’s characteristics would be useful in determining its identity with a dichotomous key?

What step do we always start with when using dichotomous keys?