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Characteris1cs of Life
• Biology – Is the science that employs the scien1fic method to study living
things. – The Greek word bios means “life,” and –logy means “study of.”
Objec&ve: Define Biology, and the meaning of Greek root.
• What does “-‐logy” mean? – Study of
• What does “Bio-‐” mean? – Life
• What does Biology study? – Life
• Give examples of what Biology studies. – Cells – Nature – Organisms
Objec&ve: Define Biology, and the meaning of Greek root.
• What is living? • What is non-‐living?
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Objec&ve: Describe some characteris1cs of living things.
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Revise/Edit your list of 6 characteris1cs
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1) Are made up of units called cells.
– Cell: the smallest unit of an organism.
2) Reproduce
– Sexual reproduc&on: cells from two different parents.
– Asexual reproduc&on: cells from a single parent.
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3) Grow and develop – Example: • From concep1on to birth to childhood to adulthood
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4) Obtain and use energy. – Metabolism: Combina1on of chemical reac1ons through which an organism builds up or breaks down material. – Example: • Ea1ng • Photosynthesis
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5) Respond to their environment. – Organisms detect and respond to s/muli. • S1mulus – is a signal to which an organism responds.
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6) Maintain a stable internal environment.
– Homeostasis – the ability of an organism to maintain a constant internal environment.
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Objec&ve: Sequence the different levels of organiza1on, from biosphere to molecules. Objec&ve: Explain how life can be studied at different levels.
• The part of the Earth that contains all ecosystems (life).
Objec&ve: Sequence the different levels of organiza1on, from biosphere to molecules. Objec&ve: Explain how life can be studied at different levels.
• Living organisms and their nonliving surroundings.
Objec&ve: Sequence the different levels of organiza1on, from biosphere to molecules. Objec&ve: Explain how life can be studied at different levels.
• Different group of organisms of the same species that live together in a defined area.
• Groups of organisms of one species (type) that live in the same area.
• Individual living things. – Example: human, bacteria, tree, etc.
Tissue → organs → organ systems
• Smallest func1onal unit of life.
– Example: plant cells, animal cells
• Groups of atoms; smallest unit of most chemical compounds
– Example: Water & DNA
• Life can be studied on any of the levels of organiza1on. – Example: • Zoologist – study animals
• Botanists – study plants • Paleontologist – study ancient life
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