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True or False: Amino acids are acids because they always possess the carbonyl functional group.

True or False: The lowest level of biological organization that can perform all the activities required for life is the tissue–for example, nervous tissue.

True or False: The element present in all organic molecules is Carbon.

True or False:  Organisms have an unchanging, constant internal environment.

Urine, with a pH of 6, is _________ times more acidic than seawater, with a pH of 8.

Water and dissolved minerals move up toward the photosynthetic leaves by traveling through which type of plant vascular tissue?  

The female portion of the flower is made of which three parts?  

Which root structures increase the surface area for water and nutrient absorption?  

The region of functional xylem in a woody plant is called the ______.  

A flower is an example of a ______.