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What are oldest life forms on earth?
In its 4.6 billion yearscircling the sun, the Earth has harbored an increasing diversity of life forms:for the last 3.6 billion years, simple cells(prokaryotes);for the last 3.4 billion years, cyanobacteriaperformingphotosynthesis;for the last 2 billion years, complex cells(eukaryotes);for the last 1.2 billion years, eukaryotes which sexually reproducefor the last 1 billion years, multicellular life;for the last 600 million years, simple animals;for the last 550 million years, bilaterians, water life forms with a front and a back;for the last 500 million years, fish and proto-amphibians;for the last 475 million years, land plants;for the last 400 million years, insects and seeds;for the last 360 million years, amphibians;for the last 300 million years, reptiles;for the last 200 million years, mammals;for the last 150 million years, birds;for the last 130 million years, flowers;for the last 60 million years, the primates,for the last 20 million years, the family Hominidae(great apes);for the last 2.5 million years, the genus Homo (human predecessors);for the last 200,000 years, anatomically modern humans.Periodic extinctions have temporarily reduced diversity, eliminating:2.4 billion years ago, many obligate anaerobes, in the oxygen catastrophe;252 million years ago, the trilobites, in the Permian-Triassic extinction event;66 million years ago, the pterosaurs and nonavian dinosaurs, in the Cretaceous-Paleogene extinction event.all dates are approximate
How many minutes should sex last with one condom before changing to another?
Condom should be changed after ejaculation
Humans have become dominant in the last years?
1 million
How long to cleanse system of a Bacardi coke mixed drink?
Alcohol leaves your system in 12 hours from your last drink, typically.
How long does a yellow fever jab last?
how long does a yellow fever injection last for
How has life changed for humans in the past 300 years?
how has life changed in the last 300 years
How has tourism changed in the last 20 years?
tourism has changed considerably in the last 30 years . Now people have more income to spend
When was Australia's education system last changed?
How is Australia's education system
How has fashion changed in the last 200 years?
in the last 200 years fashion has changed in many wayse.g. in the 1960's the mini skirt was introduced
How has technology changed over the last 5 years articles?
How has technology changed in the last 5 years articles This doesnt help u now does it :)
How has communication changed in the last 100 years?
Communication has changed very much in the past 100 years.
How has tourism changed in the last 50 years?
Tourism has changed in the past 50 years by 35% and is still on the increase.
how has population changed in the last 200 years?
the crops
How has transport changed in the last ten years?
Arplanes
Has the definition of art changed in the last 1000 years?
no
What metric system is used in London?
The United Kingdom, of which London is the capital, has been in the gradual process of changing from the Imperial System of weights and measures (inches, feet, pounds, ounces, pints gallons etc.) for the last 25 years or so. The metric system is now used to measure most commodities, with the notable exceptions of beer and milk which are both still sold in pints. The temperature scale has also changed from Fahrenheit to Celsius. The British monetary system changed to metric in 1971.
How do you correct did you see the lost kingdom on television last knight?
The correct sentence is: Did you see The Lost Kingdom of television last night. 'Knight' is changed to 'night' because 'knight' is a knight in armor.
