Biology, 28.02.2020 20:27 ashtonrieper2721
Short-spined sea urchin fossils were found directly above long spined sea urchin fossils in a layer of rock. What do the differences between the two sets of sea urchin fossils suggest about them? a. The longer spines developed as the shorter-spined sea urchins grew older. b. The longer-spined sea urchins existed before the shorter-spined sea urchins. c. The shorter-spined sea urchins stretched their spines to ward off predators. d. The shorter spines did not protect the sea urchins well enough and they died off
Answers: 1
Biology, 21.06.2019 15:00, wfergphilly3159
Choose a mutation from those in model 2 that would be neutral for a cell. explain your reasoning by relating the mutation to the cellular respiration process.
Answers: 3
Biology, 22.06.2019 14:00, loudermilkb117
Are gametes exactly the same? explain why or why not?
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Short-spined sea urchin fossils were found directly above long spined sea urchin fossils in a layer...
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