Which characteristic of muscle tissue allows it to return to its original length after stretching?

What morphological (what you can see without a microscope) characteristics of a plant can be used to identify its species?

Zone 1 of the USDA hardiness zones never experiences frost.

_______is the culturally defined period between childhood and adulthood.

The Ginkgo (the Maiden Hair tree) is the only species found in its family.

Temperment is the general pattern of attention, arousal, and mood that is evident from birth. 

What is needed in the following reaction: ____ + Pi + energy → ADP.

According to the graph in the accompanying figure, chlorophyll absorbs light most strongly in what region of the electromagnetic spectrum?

What is the safest thing to do if a person misses a contraceptive pill and is regularly having sex that can cause pregnancy? 

The highest concentration of nerve endings in the penis is in the