What evidence is there that the impact on Earth of an asteroid caused the mass e
ID: 292679 • Letter: W
Question
What evidence is there that the impact on Earth of an asteroid caused the mass extinction at the end of the Cretaceous Period?
Only in North America, at the Cretaceous-Paleogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted rock.
On a global scale, at the Cretaceous-Paleogene boundary, there is a high concentration of methane, shocked mineral grains, and microspherules formed from droplets of melted rock.
On a global scale, at the Cretaceous-Neogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted meteorite.
On a global scale, at the Cretaceous-Paleogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted rock.
How did terrestrial floras change during the Cretaceous Period?
Angiosperms, or flowering plants, diversified, but gymnosperms and ferns remained more abundant in most environments on the land.
Gymnosperms, or flowering plants, diversified, but angiosperms and ferns remained more abundant in most environments on the land.
Angiosperms, or flowering plants, diversified and became most abundant on the land, while gymnosperms and ferns remained plentiful.
Angiosperms and gymnosperms, or flowering plants, diversified in most environments on the land, but ferns became extinct.
How did the evolutionary expansion of predatory taxa transform the marine ecosystem during the Cretaceous?
Bony fishes, sharks, and swimming reptiles diversified markedly during Cretaceous.
Ichthyosaurs, plesiosaurs, and crocodiles diversified markedly during Cretaceous.
Crabs, teleost fishes, and carnivorous snails diversified markedly during Cretaceous.
Crabs, bony fishes, and plesiosaurs diversified markedly during Cretaceous.
Only in North America, at the Cretaceous-Paleogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted rock.
On a global scale, at the Cretaceous-Paleogene boundary, there is a high concentration of methane, shocked mineral grains, and microspherules formed from droplets of melted rock.
On a global scale, at the Cretaceous-Neogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted meteorite.
On a global scale, at the Cretaceous-Paleogene boundary, there is a high concentration of iridium, shocked mineral grains, and microspherules formed from droplets of melted rock.
How did terrestrial floras change during the Cretaceous Period?
Angiosperms, or flowering plants, diversified, but gymnosperms and ferns remained more abundant in most environments on the land.
Gymnosperms, or flowering plants, diversified, but angiosperms and ferns remained more abundant in most environments on the land.
Angiosperms, or flowering plants, diversified and became most abundant on the land, while gymnosperms and ferns remained plentiful.
Angiosperms and gymnosperms, or flowering plants, diversified in most environments on the land, but ferns became extinct.
How did the evolutionary expansion of predatory taxa transform the marine ecosystem during the Cretaceous?
Bony fishes, sharks, and swimming reptiles diversified markedly during Cretaceous.
Ichthyosaurs, plesiosaurs, and crocodiles diversified markedly during Cretaceous.
Crabs, teleost fishes, and carnivorous snails diversified markedly during Cretaceous.
Crabs, bony fishes, and plesiosaurs diversified markedly during Cretaceous.
Explanation / Answer
ANSWER-
1. On global scale,the cretaceous-palaeogene boundary,there is high concentration of iridium ,shocked mineral grains and microspherules formed from droplets of melted rocks.
2.Angiosperms or flowering plants diversified and became more abundant on the land ,while gymnosperms and ferns remain plentiful.
3.Ichthyosaurs,plesiosaurs and crocodiles diversified markedly during cretaceous.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.