Biology, 24.03.2020 22:01 wickedskatboarder
Mass extinctions have occurred five times in Earth’s history. The end Permian and Cretaceous extinctions were responsible for removing a large percentage of organisms from the planet. How do these extinctions contribute to the biodiversity we see today? A. Species that have gone extinct are able to re-evolve from the ancestors that survived the extinction. B. Species that remain after the extinction are able to radiate, new adaptations arise, and these produce the diversity seen today. C. Species that remain after the extinction are unable to speciate, therefore the number of species on Earth today is lower than just before either extinction. D. Species that remain after the extinction represent all of the lineages that were present before the extinction event, therefore diversity of lineages is not changed by extinction.
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Biology, 21.06.2019 19:30
Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
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Biology, 22.06.2019 07:00
The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.
Answers: 1
Biology, 22.06.2019 11:40
Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above
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Mass extinctions have occurred five times in Earth’s history. The end Permian and Cretaceous extinct...
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