An adaptation in one environment may be useless or harmful in different circulstances.
a. true
b. false
Answer: a. true
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The ____ are respiratory structures composed of moist evaginations
a. tracheal tubes b. lungs c. gills d. skin e. nasal passages
Answer the following statements true (T) or false (F)
1.Teeth are mineralized structures for holding and breaking up food. 2.When cleaning up from lab, you are asked to place two intestinal tracts in the appropriate bins. You would put the shorter one in a bin marked "herbivore" and the longer one in a bin marked "carnivore." 3.An autotroph obtains the energy it needs to maintain homeostasis from the sun. 4.A heterotroph obtains the energy it needs to maintain homeostasis from the sun. 5.Endotherms need more energy than ectotherms since they must do more metabolic work to maintain body temperature.
In the mid-twentieth century, researchers discovered that genes are made of ____________________ and that this
molecule is part of cellular structures known as ____________________. Fill in the blank(s) with the appropriate word(s).
All psychiatric illnesses studied to date have been shown to result from a mutation in a single gene
a. True b. False