Question

PROOFREADING
The student investigates, comprehensively, an astronomical event.
communicates the processed data and information by describing and explaining key stages of the event, explaining thoroughly links between key stages of the event. This may involve elaborating, applying, justifying, relating, evaluating, comparing and contrasting, and analysing.
1. What biological evidence is there that a mass extinction event happened 65 million years ago?

Biological evidence of fossils shows us multiple strong signs that a mass extinction happened during the k-t period. Fossils that are abundant in rock layers directly below the k-t border abruptly and unexpectedly diminish above the k-t layer. Other evidence for an extinction is that many species’ fossils disappear at the same time. 75% of species became extinct at the k-t boundary. The fact that many extinctions transpired at the same time supports the hypothesis that there was a mass extinction, as it is not unusual for a few species to become extinct, species go extinct often, but because so many species went extinct it is classed as mass extinction. The fossil record shows that the dinosaurs all went extinct suddenly and drastically, this cause for belief that it was not just evolution that killed out the dinosaurs. a sudden disappearance of dinosaur fossils above the k-t period implies that catastrophe struck the dinosaurs. This is contradictory to the patterns they had exhibited before the k-t boundary, with their fossils showing no signs of decline. This gives strong evidence for scientists to believe a mass extinction occurred due to natural disaster or extra terrestrial impact rather than just evolution and natural selection.

Answer 1

answer:

The student investigates, comprehensively, an astronomical event.

explanation: