`1 what happens when an action potential reaches the end of the axon a the potassium ions travel back towards the cell body b the neuron takes up chemical messengers (neurotransmitters) c the sodium ions travel back towards the dendrites d the neuron releases chemical messengers (neurotransmitters)

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection