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How many years ago did life first begin on earth?
4.567 million years ago
How many years has the first step pyramid been standing?
About 5,000 years, since King Djoser. Rachel
How many years ago did large amounts of oxygen gas first appear on Earth's atmosphere?
After plants developed chlorophyll and multiplied to the point where they could "pollute" the primal atmosphere, somewhere between 1 and 2 billion years ago.
Which bryophyte is found in bogs and swamps and forms peat a source of fuel?
Moss can be found in bogs and swamps and in many countries is used as a form of fuel. There is many types of mosses, one type is called Sphagnum.
How many eons old is earth?
Since earth first achieved dynamic balance (became a globe) is about 4.5 billion years.
How many years has the coelacanth fish existed?
Coelacanth fish first appear in the fossil record about 410 million years ago.
How many years ago did the first cell appear?
The first cells appeared about 3 billion years ago. This is based on fossel records (the earth is about 4.5 billion years old)
When did the lenape Indians first appear in New Jersey?
They traveled to new jersey many years ago-like about 12,000 years ago
How many million years ago did complex cellular structures appear?
4.6 billion years ago the first procaryotic cells were discovered on planet earth
When was the blow dart invented?
Over 40,000 years ago, the first blowguns began to appear in many different parts of the world.
When do symptoms of narcolepsy usually begin to appear?
usually appear during the teens or 20s, the disease may not be diagnosed for many years. Most often, the first symptom is an overwhelming feeling of fatigue
How many years ago did George Washington's image first appear on the 1 bill?
George Washington's image first appeared on the $1 bill in 1869, making it over 150 years ago.
How many years does it take a comet to appear?
It take exactly 75 to 76 years.
Do mosses need water to reproduct?
Mosses need water to reproduce sexually but many mosses also make use of vegetative reproduction techniques, some of which are dependent on water (for some, for example, the kinetic energy of falling water droplets) and other techniques depend on dry conditions. Mosses produce female and male structures known as archegoniums and antheridiums, respectively. These in turn produce eggs and sperms. Sometimes they appear on one and the same moss plant and sometimes they appear on different individuals. But even if they appear on the same plant they are always a distance apart, so in order for the gametes to meet, the male sperm is motile. It is equipped with two long tails and is able to swim quite effectively. But, of course, only when there's water present. Therefore, mosses can only reproduce sexually in wet conditions, either during rainy weather or in the presence of dew.
How many years ago did the first simple cell appear on earth according to most scientific models?
4 billion. Carbon dating has led to estimates that the first simple cells appeared on earth about 4 billion years ago.
Is the bus driver from Forrest gump meant to be the same character at both ends of the film or a sight gag?
they are supposed to be the same person, aged however many years had occurred between when they first appear to when they appear at the end.
When do many mental illnesses first appear?
In your late childhood.
