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 19:00
Select the correct answer.which scenario describes unethical lab behavior? a.danny stores the chemicals required for his experiment in flasks and beakers.b. anna publishes the results of her experiment on the growth rate of saplings.c. jason repeatedly runs an experiment until he gets the results he desires.d. mia records her observations of an experiment precisely and accurately.resetnext
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Biology, 22.06.2019 04:30
In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?
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Biology, 22.06.2019 12:30
This is the interaction of two organisms where one is and the other is neither nor harmed.
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Biology, 22.06.2019 19:40
Which process takes place last in the human being which process takes place last in the development of a human being
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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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