Which of the following is an autotroph
a-dodder b-sunflower
c-fungi d-algae

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 two fields of study provide the core information that is used to classify organisms?

What was the land like over 500 million years ago? what was under the sea?