Hibiscus
Molecular,
genetic and biochemical level through organelles, cells, tissues,
organs, individuals, plant populations, and communities of plants are
all aspects of plant life that are studied. At each of these levels a
botanist might be concerned with the classification (taxonomy),
structure (anatomy and morphology), or function (physiology) of plant
life.
Historically all living things were grouped as animals or plants, and
botany covered all organisms not considered animals. Some organisms
included in the field of botany are no longer considered to belong to
the plant (plantae) kingdom, which obtain their energy via
photosynthesis, – these include bacteria (studied in bacteriology),
fungi (mycology) including lichen-forming fungi (lichenology),
non-chlorophyte algae (phycology) and viruses (virology). However,
attention is still given to these groups by botanists, and fungi
(including lichens), and photosynthetic protists are usually covered in
introductory botany courses.
The study of plants is vital because they are a fundamental part of life
on Earth, which generates the oxygen, food, fibres, fuel and medicine
that allow humans and other life forms to exist. Through photosynthesis,
plants absorb carbon dioxide, a greenhouse gas that in large amounts
can affect global climate. Just as importantly for us, plants release
oxygen into the atmosphere during photosynthesis. Additionally, they
prevent soil erosion and are influential in the water cycle. Plants are
crucial to the future of human society as they provide food, oxygen,
beauty, medicine, habitat for animals, products for people, and create
and preserve soil. Paleobotanists study ancient plants in the fossil
record. It is believed that early in the Earth's history, the evolution
of photosynthetic plants altered the global atmosphere of the earth,
changing the ancient atmosphere by oxidation.
Hibiscus
Molecular,
genetic and biochemical level through organelles, cells, tissues,
organs, individuals, plant populations, and communities of plants are
all aspects of plant life that are studied. At each of these levels a
botanist might be concerned with the classification (taxonomy),
structure (anatomy and morphology), or function (physiology) of plant
life.
Historically all living things were grouped as animals or plants, and
botany covered all organisms not considered animals. Some organisms
included in the field of botany are no longer considered to belong to
the plant (plantae) kingdom, which obtain their energy via
photosynthesis, – these include bacteria (studied in bacteriology),
fungi (mycology) including lichen-forming fungi (lichenology),
non-chlorophyte algae (phycology) and viruses (virology). However,
attention is still given to these groups by botanists, and fungi
(including lichens), and photosynthetic protists are usually covered in
introductory botany courses.
The study of plants is vital because they are a fundamental part of life
on Earth, which generates the oxygen, food, fibres, fuel and medicine
that allow humans and other life forms to exist. Through photosynthesis,
plants absorb carbon dioxide, a greenhouse gas that in large amounts
can affect global climate. Just as importantly for us, plants release
oxygen into the atmosphere during photosynthesis. Additionally, they
prevent soil erosion and are influential in the water cycle. Plants are
crucial to the future of human society as they provide food, oxygen,
beauty, medicine, habitat for animals, products for people, and create
and preserve soil. Paleobotanists study ancient plants in the fossil
record. It is believed that early in the Earth's history, the evolution
of photosynthetic plants altered the global atmosphere of the earth,
changing the ancient atmosphere by oxidation. 
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