Scientists have suggested we live in a new epoch, the Anthropocene, which is marked by the number of people on Earth.

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 must be true for natural selection to heppen

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.