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In what era did The largest mass extinction in history wiped out approximately 90 percent of all marine animal species?
Wiki User
∙ 13y ago
I believe in cretaceous era
The Permian Extinction at the end of the Permian era wiped out over 90% of all life on Earth. It happened around 248 million years ago. We think it was a combination of volcanism, and massive global environmental change. There is some evidence (very little) that a comet or asteroid hurried things along.
Wiki User
∙ 13y ago
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What are the world's largest consumer markets?
The current largest consumer market consists of 28.9 percent of the United States. Japan is the second largest at 8.5 percent and Germany is the third largest at 5.65 percent.
What will happen if the ozone layers is reduced by 40 percent?
If the ozone layer is reduced by 40 percent, UV will enter. This will cause extinction of life.
What group of animals might have been driven to extinction by an asteroid impact 65 million years ago?
Around 65 million years ago, something unusual happened on our planet--and we can see it in the fossil record. Fossils that are abundant in earlier rock layers are simply not present in later rock layers. A wide range of animals and plants suddenly died out, from tiny marine organisms to large dinosaurs. Species go extinct all the time. Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct. So the demise of dinosaurs like T. rex and Triceratops some 65 million years ago wouldn't be especially noteworthy--except for the fact that around 50 percent of all plants and animals alive at the same time also died out in what scientists call a mass extinction. A Brief History of Earth Mass extinctions--when at least half of all species die out in a relatively short time--have happened only a handful of times over the course of our planet's history. The largest mass extinction event occurred around 250 million years ago, when perhaps 95 percent of all species went extinct. Top Five Extinctions Cambrian Explosion: Early life-forms began to flourish. (540 million years ago) Ordovician-silurian Extinction: Small marine organisms died out. (440 mya) Devonian Extinction: Many tropical marine species went extinct. (365 mya) Permian-triassic Extinction: The largest mass extinction event in Earth's history affected a range of species, including many vertebrates. (250 mya) Triassic-jurassic Extinction: The extinction of other vertebrate species on land allowed dinosaurs to flourish. (210 mya) Cretaceous-tertiary Extinction: (65.5 mya) The Name Game Scientists refer to the major extinction that wiped out nonavian dinosaurs as the K-T extinction, because it happened at the end of the Cretaceous period and the beginning of the Tertiary period. Why not C-T? Geologists use "K" as a shorthand for Cretaceous. "C" is shorthand for an earlier period, the Cambrian. Dawn of a New Age The extinction that occurred 65 million years ago wiped out some 50 percent of plants and animals. The event is so striking that it signals a major turning point in Earth's history, marking the end of the geologic period known as the Cretaceous and the beginning of the Tertiary period.
What percentage of Minnesota is covered in lake water?
Approximately 6 Percent.
How much percentage of water in yarrow?
There are approximately 25 percent of water in yarrow.
For approximately what percent of earth's total history has man been in existence?
.003 %
What era had 95 percent of species die out?
The worst known mass extinction in Earth's history was the Permian-Triassic Extinction Event at the end of the Permian period. The Permian period was the last period of the Paleozoic Era.
Approximately 10 percent of your credit score is determined by your payment history?
no its actually 35%
What Asian country has the largest Muslim population?
The Asian country with the largest Muslim population is the Republic of Indonesia. Approximately 12.7 percent of the entire Muslim population lives in Indonesia.
Has Extinction killed 99 percent of life on earth?
No of couse not!
What episode wiped out many insects in the world?
The Cretaceous-Palogene event was a mass extinction that occurred more than 65 million years ago. Approximately 75 percent of all species on earth vanished.
The air you breathe in is in the?
mainly nitrogen (approximately 78 percent) and oxygen (approximately 21 percent) there are approximately 1 percent other gases, which includes carbon dioxide at 0.04 percent (aprrox.)
What are the world's largest consumer markets?
The current largest consumer market consists of 28.9 percent of the United States. Japan is the second largest at 8.5 percent and Germany is the third largest at 5.65 percent.
What percent of 163 is 108.5?
approximately 66.56 percent
What percent of 3377 is 2397?
Approximately 71 percent.
Which is largest 0.4 0.43 0.397 39 percent 42 percent?
The largest is 0.43 (0.43 = 43%)
Approximately 60 percent to 80 percent of a cell is what?
water
