Which best explains have Fern fossils can be found in present-day Arctic regions? A. Ferns were carried there by ocean waves and started growing in the frozen soil.
B. Ferns seeds were planted there by human travelers.
C. The arctic region was once closer to tropical latitudes where ferns grew naturally.
D. The arctic region caused ferns to mutate.

Please hurry, I'm adding 15 points
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Explain two reasons you think it is important for scientists to search for new ways to treat cancer

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.