The term extraterrestrial can be adjective or noun. In adjective case, the term extraterrestrial refer occurring or existing beyond the earth's atmosphere. In noun case, the term extraterrestrial refer being from the beyond the earth's atmosphere.
The biological relationships existing amount the organisms are Mutualism, Parasitism, Communalism and Amensalism. A tick is an example of the parasitism relationship, while a tick bird on a rhino represents a mutualism relationship.
An extraterrestrial life form is any form of life that did not evolve on Earth. That includes plant life, micro organisms, animals from other planets, and, possibly even some forms of life that have evolved out in space. So far… Full Answer
Astrobiology and exobiology are fields of science that include the search for life beyond Earth, and the possible effects of extraterrestrial environments on living things. There has been no confirmed evidence of life existing beyond the Earth as of 2013.
There so many different relationships existing in an ecosystem. The most common ones are symbiotic and parasitic relationship. The parasitic is harmful to the host but the symbiotic relationship has both organisms benefiting.
"Extra" = 'outside of' or 'beyond' "Terrestrial" = an adjective referring to Earth "Extraterrestrial" = adjective saying that the thing is outside of Earth Examples: -- 'extraterrestrial rock' is a rock that is, or came from, outside of Earth… Full Answer
There is a scientific research group that runs a program called the SETI program (Search for Extra Terrestrial Intelligence). I do not know that there is a branch that deals with the subject, as most extra terrestrial life is just… Full Answer
Competition occurs when organisms existing at the same time and in the same place struggle for the same limited resources. This is one of the three major types of interactions among organisms, the other two being predation and symbiosis.
Many-celled organisms can double without having to split DNA and a nucleus, they just divide the cell in half with all the existing parts. Single-celled organisms have to split a nucleus before dividing.