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"They" happened by accident (i.e. mutations), and the ones that were more efficient eat the less efficient. That's life.
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What spheres do each of the five branches of earths science study?
Geosphere - The Earth and its features Hydrosphere - The Earth's water, in any form Atmosphere - The "gaseous envelope" that surrounds the Earth Biosphere - The living plants, animals, and other organisms that inhabit the Earth
What is the subjects that need to study geology?
Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them. It includes the study of the organisms which inhabit our planet. A very important part of geology is the study of how Earth’s materials, structures, processes and organisms have changed over time.
Would bacteria that inhabit a cave deep inside Earth be considered part of the biosphere?
Yes, indeed. The study of organisms that are either permanent cave-dwellers or use caves as, e.g., roosts, is a one of the various sciences under the umbrella term "speleology".
What type of organisms first appeared on earth?
Earth's first organisms were the Single- Celled organismsBacteriaFungiAnd Protozoa
The gaia hypothesis treats the earth?
The Gaia hypothesis, also known as Gaia theory or Gaia principle, proposes that all organisms and their inorganic surroundings on Earth are closely integrated to form a single and self-regulating complex system, maintaining the conditions for life on the planet.
How many organisms are estimated to inhabit the earth?
Upwards to the trillions.
What changes were necessary in earth's atmosphere to allow complex organisms to evolove?
During the few billion years following the appearance of cyanobacteria, oxygen became a major gas in Earth's atmosphere. The ozone layer in the stratosphere also began to develop, shielding Earth from ultraviolet rays. These major changes in the air allowed species of single-celled organisms to evolve into more complex organisms.
What events occurred that allowed single - celled organisms to into more complex organisms at the end of the precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What event occurred that allowed single celled organisms to evolve into more complex organisms at the end of the Precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What events occured that allowed single celled organisms to evolve into more complex organisms at the end of the precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What event occured that allowed single celled organisms to evolve into more complex organisms at the end of the precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What event occurred that allowed single-celled organisms to evolve into more complex organisms at the end of the Precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
What events occurred that allowed single celled organisms to evolve into more complex organisms at the end of the Precambrian time?
the ozone layer began to develop shielding earth from ultraviolet rays, this was hypothesized that these changes allowed species of single celled organisms to evolve into more complexed organisms
Are Gamma rays harmful to earth?
Gamma rays are not necessarily harmful to the planet Earth, but to all the living organisms that inhabit it, as Gamma is a powerful form of radiation.
What percent of the earth's total thickness do we inhabit?
we inhabit 89% of earth's thickness
What way are all living organisms on Earth similar?
All organisms use the same genetic code.Living organisms are made of the same components as all other matter, organisms that inhabit the earth at any one time they are all assembled from a nucleic acid code
In what way are all living organisms similar?
All organisms use the same genetic code.Living organisms are made of the same components as all other matter, organisms that inhabit the earth at any one time they are all assembled from a nucleic acid code
