Author: Anonymous

If a structure has no apparent function in one species, yet is homologous to a functional organ in another species, this structure is termed:

The following question comes from the video The Origin of Birds. Feathers were initially evolved for ______ then eventually were modified for ______. 

There are currently many similar-looking but different species on either side of the Isthmus of Panama. They most likely resulted from:

Which of the following describes the endosteum of a long bone?

During endochondral ossification, secondary ossification centers develop:

Determine whether the underlined portion of the statement is true or false. The ends of axon terminals enlarge into swellings called motor end plates.

Determine whether the underlined portion of the statement is true or false. Continuous conduction occurs along the entire membrane of myelinated axons.

All the following are sensory functions of the nervous system EXCEPT:

Which of the following describes the endosteum of a long bone?

Dorothy was walking through the woods arm in arm with two friends and her little dog, when all of the sudden a lion, a tiger and a bear jumped out of the bushes at them.  Dorothy jumped up and screamed “Lions and Tigers and Bears!  Oh My!”  She started running.  Her legs were churning and her heart was pumping.  When she finally stopped, she was completely out of breath.  After several minutes, her heart rate returned to normal, her breathing slowed and she started to calm down.  She turned to her little dog and whispered “Oh Toto!  There’s no place like home.” What portion of Dorothy’s PNS caused her legs to “churn”?