11. When did surfing begin (p.51)?

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

Which of the following is a common danger of commercial fishing?

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