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Unlike primate call systems, which consist of a limited number of sounds that are only produced when particular stimuli are encountered, humans are capable of ____, the ability to talk about things that are not present.

In what group of plants do Sago palms belong?

What is the scientific name of the Green ash? Fill in the blank.  

What is the scientific name of the Eastern red cedar? Fill in the blank.  

What is the common name of Fraxinus pennsylvanica? Fill in the blank.  

What is the sex of the field cricket shown below?

What is the common name of a member of the genus Gryllus? Fill in the blank.

What is the scientific name of the Golden silk spider? Fill in the blank.  

During internal respiration, the oxygen moves from ___ to ____. 

According to Harry Stack Sullivan, if adolescents fail to develop close friendships, they