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If you include bacteria, then about 4 billion years.
(The earliest KNOWN life is 3,5 billion years old, but it had probably been around longer). If you want multicellular organisms , then about 1.2 billion years. Cambrian time period.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoCambrian
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How long has the fungi kingdom been on Earth?
Life on earth could not exist without fungi. The Fungi Kingdom has been on earth since about 1,500 million years ago.
What is the name invertebrates with seven pairs of legs?
Invertebrates with seven pairs of legs are called isopods, from the family of invertebrates known as isopoda.
Are butterflies vertebrate or invertebrate?
Invertebrates. Butterflies are what is classified as an insect. Insects have no vertebrae; instead they have an exoskeleton.
What is the difference between the epidermis of human and invertebrates?
We have a thin epidermal layer of epithelial tissues, whereas invertebrates have a tough outer covering, shells, or exoskeleton.
Simplest kind of invertebrates?
The simplest kind of invertebrates would be sea sponges. They are part of the phylum Porifera and are the only animals that do not have a nervous system at all.
Is earth worm vertebrates or invertebrates?
INVERTEBRATES!!
Are there more invertebrates or vertebrates on earth?
Approximately 95% of living animals on Earth are invertebrates. So there are more invertebrates.
Is 60 percent of the animals on earth invertebrates?
No, 95-97% of all animals on Earth are Invertebrates.
Are there more vertebrates than invertebrates living on earth?
No, there aren't. Approximately 95% of Earth's creatures are invertebrates.
How long has archaebacteria been on earth?
how long has archaebacteria been on earth? how long has archaebacteria been on earth?
Is there a place where invertebrates can't be found?
On the surface of the earth: not really, invertebrates have been found from the very depths of the ocean, to the coldest mountain tops. It is unlikely that you will find invertebrates closer to the center of the earth (ie, deeper than the crust) however no-one has actually tried since it is impossible with today's technology. We also have not yet found them outside the earth (otherwise they would literally be aliens).
Are ninety-five percent of animals on earth invertebrates?
I do not know if there is an exact percentage, but I do know that the of the known species, the most are invertebrates. This is because bugs are invertebrates. There are so many different species of bigs, just the insects alone, that we cannot find and name them all. Also you have many other groups of invertebrates.
Which category of animals make up 90 percent of the animal world?
invertebrates (animals without backbones) this isn't accurate as some of the Earth's species haven't yet been discovered. anyways,hope this helped:)
How long have mice been on this earth?
they have been on the earth for along time
What are the most common invertebrates on earth and why?
Arthropods
How long has wood been on earth?
forever it was on earth when the earth was made
Why do you have to protect invertebrates?
If there is no invertebrates there will be no life on earth, for example pollinators such as bees and butterflies are important for plants to complete their life cycle.
