Lichens are actually made of two organisms: algae and fungi. The algae provide food for the fungus, while the fungus provides protection for the algae. This type of relationship is known as: Predation
Parasitism
Mutualism
Commensalism

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later.when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

What feature of cell theory is best demonstrated in the image

The cluster of developing cells from conception until birth is called an