Question

multiple select question select all that apply select all the correct statements regarding the asteroid and the resulting mass extinction that ended the mesozoic era. the asteroid was about 10 kilometers in diameter. the point of impact of the asteroid was near the yucatán peninsula. so much debris was cast into the atmosphere that photosynthesis was essentially nonexistent for about 3 years. plankton in the marine environment survived and nourished the larger marine dwellers. the asteroid was filled with mercury, which killed the dinosaurs.

Explanation:

1. The asteroid that caused the mass - extinction at the end of the Mesozoic era was about 10 kilometers in diameter and impacted near the Yucatán peninsula. The debris cast into the atmosphere blocked sunlight, halting photosynthesis for about 3 years. Plankton in the marine environment did not survive in the way described; instead, the disruption of the food - chain had a major impact on marine life. Also, there is no evidence that the asteroid was filled with mercury and that it killed the dinosaurs in that manner.

Answer:

The asteroid was about 10 kilometers in diameter.
The point of impact of the asteroid was near the Yucatán peninsula.
So much debris was cast into the atmosphere that photosynthesis was essentially nonexistent for about 3 years.