Nature refers to the material world and its phenomena;
those things which exist in reality as part of the
universe, and are not artificial, or imagined.
In scale, 'nature' includes everything from the universal to the
subatomic. This includes all things animal, plant, and mineral,
as well as events (hurricanes, tornadoes, earthquakes).
It also includes the behaviour of living animals, and the processes
associated with inanimate objects.
Life is the physical state perpetuated by functional systems through
which an organism obtains energy, grows and reproduces itself.
Life as we know it probably first arose on Earth about three to four
thousand million years ago.
Continued.
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Agriculture is the science and practice of cultivating of land,
producing crops, and raising animals. It also refers to many associated
processes or enterprises, such as food processing.
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Animals (Kingdom Animalia) comprise one of the five kingdoms of living organisms and are characterized as being multicellular creatures who are able to sense their surroundings and respond to them through voluntary motion. Along with other lifeforms, animals are a part of the domain Eukaryota. Colloquially, the term "animal" is often used in the narrower sense of non-human animals.
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The science of life and living organisms, biology studies the form,
structure, function, growth and development,
behavior and interaction of all living things.
Biologists study the characteristics of life forms,
such as their cellular organization and development,
how they respond to stimulation,
the chemical processes of their growth and production of energy
(metabolism) and how they reproduce.
But the underlying question all biologists try to answer is,
What is life?
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Evolution is any process of growth, change or development. The word stems from the Latin evolutio meaning "unfolding" and prior to the late 1800s was confined to referring to goal-directed, pre-programmed processes such as embryological development. A pre-programmed task, as in a military maneuver, using this definition, may be termed an "evolution." One can also speak of stellar evolution, cultural evolution or the evolution of an idea.
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To the Babylonians it was Nergal, a god of death and pestilence.
To the Egyptians it was Har Decher, the Red One. The Greeks called it
Ares after their god of war, while the Romans called it Mars.
This blood-red colored planet intrigued mankind for almost as long as
history has been recorded. Even today countless of books and movies
have entertained millions on the subject, lighting up vivid
imaginations. However, how much do we really know about this heavenly
body? Is there life on mars, or has there ever been life there?
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Plants (kingdom Plantae) are multicellular eukaryotic organisms that generally do not have sensory organs or voluntary motion and have when complete, a root, stem, and leaves, though consisting sometimes only of a single leafy expansion.
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