Which piece of evidence BEST explains what caused scientists to believe that the fish from the Tanis fossils were still living
during the time of the asteroid strike?
✔
(A)
Previous work also suggested that some fish fossils here had tiny round shapes on them that are likely
solidified globs of molten and vaporized rock-material that had been flung skyward by the asteroid
impact. And tiny globs were in the fishes' gills.
Some fish bones have features that can record seasonal and annual cycles of growth. These are similar
to the growth rings in trees. Such patterns in bone typically appear as alternating thick and thin bands.
The regularity of the lines of arrested growth seen in the fish bones also suggests strongly that the fish
weren't suffering from drought or famine when they died.
In fact, During says, "By all indications, these fish were doing fine." Taken together, she says the fossils
point to the Northern Hemisphere spring as when the dino-killing impact took place.
(B)
(C)
(D)