levels of organization of living things
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LESSON # 2 (Chapter 1). Levels of Organization of Living Things. W H A T I S L I F E ?. Life is defined in terms of a group of characteristics possessed by living things:. 5- Can reproduce, through the use of information encoded in DNA. 1- Can assimilate and use energy. - PowerPoint PPT PresentationTRANSCRIPT
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Levels of Organization of Living Things
LESSON # 2 (Chapter 1)
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W H A T I S L I F E ? Life is defined in terms of a group of characteristics possessed by living things:
4- Posses an inherited .information base, encoded in DNA that allows it to function.
8- Are highly organized compared to inanimate objects.
Every one of these qualities exists in all the varieties of Earth’s living things. A simple cell can do all of the things listed above.
1- Can assimilate and use energy.
2- Can respond to their environment.
3- Can maintain a relatively constant internal environment.
5- Can reproduce, through the use of information encoded in DNA.6- Are composed of one or more cells.
7- Evolved from other living things.
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The human body consists of about 100 trillion cells
(100 000 000 000 000 cells)
Each of these cell has in it a complement of DNA that is made up of 3 billion (3 000 000 000) of chemical
building blocks (atoms)
THE LIVING WORLD IS VERY COMPLEX
That is why the organization of living matter is extremely important
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THE LIVING WORLD IS ORGANIZED IN A HIERARCHICAL MANNER
HIERARCHICAL MANNER: Levels of organization are progressively integrated to
make up higher levels.
Levels of Organization in Living Things
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AtomsAtoms combine
to form
Molecules
SMALL MOLECULE
H O 2
MACROMOLECULE
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Organelles Atoms Molecules Molecules come together to form
Highly organized structures with one special function. Ex: mitochondria, ribosomes.
Atoms combine to form
CellsCells are the smallest units of living things. Life actually occurs in cells. Each cell contains hundred of organelles.
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Organelles Atoms Molecules Molecules come together to form
Highly organized structures with one special function. Ex: mitochondria, ribosomes.
Atoms combine to form
CellsCells are the smallest units of living things. Life actually occurs in cells. Each cell contains hundred of organelles.
A collection of cells that serve a common function. Ex: nervous tissue.
Tissues
Nervous tissue
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Connective tissue
Epithelial tissue
Muscle tissue
Different types of tissues make up organs
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Connective tissue
Epithelial tissue
Different types of tissues make up organs
Cardiac muscle tissue
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Atoms Molecules Cells
OrgansTissues
Organelles Atoms combine
to form molecules.
Small molecules: water Macromolecules: DNA, proteins.
Highly organized structures with one special function. Ex: mitochondria, ribosomes.
Each cell contains hundred of organelles. They can do all things listed previously. Life actually occurs in cells.
A collection of cells that serve a common function. Ex: muscle tissue.
A functioning unit formed by several kinds of tissues. Ex: The heart, a blood vessel, the brain
Organisms can be formed by only one cell ( bacteria) or trillions of cells organized in organ systems (human).
Organ SystemsDifferent organs that work together closely. Ex: Cardio- vascular system, respiratory system, nervous system
Organisms
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One-celled bacteria are also organisms
The human body consists of about 100 trillion cells (100 000 000 000 000 cells)
O R G A N I S M S
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Atoms Molecules Cells
OrgansTissues Organisms
Organelles Atoms
combine to form
molecules.
Small molecules: water Macromolecules: DNA, proteins.
Highly organized structures with one special function. Ex: mitochondria, ribosomes.
Each cell contains hundred of organelles. They can do all things listed previously. Life actually occurs in cells.
A collection of cells that serve a common function. Ex: muscle tissue.
A functioning unit formed by several kinds of tissues. Ex: The heart, a blood vessel, the brain
Organisms can be formed by only one cell ( bacteria) or trillions of cells organized in organ systems (human).
Organ SystemsDifferent organs that work together closely. Ex: Cardio- vascular system, respiratory system, nervous system
Community BiospherePopulationMembers of a single type of living thing (species), living in one area.
All the kind of living things in a given area (several species).
EcosystemThe community of organisms plus all the non-living elements
The interactive collections of all the Earth’s ecosystems
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