Chapter 1 : Exploring Life Flashcards Preview

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Flashcards in Chapter 1 : Exploring Life Deck (25):
1

Biology

The scientific study of life

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Unity

All living things exhibit differences from one another

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Diversity

All living things exhibit unique differences form one another

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7 Overall Themes explored in Biology

1. All forms of life share common properties
2. In life's hierarchy of organization, new properties emerge at each level
3. Cells are the structural and functional unit of life
4. Organisms interact with their environment exchanging matter and energy
5. The unity of life is based on DNA and common genetic codes
6. The diversity of life can be arranged into 3 domains
7. Evolution explains the unity and diversity of life

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The common properties of all living things

Regulation
Energy processing
Order
Response to environment
Growth and development
Evolutionary adaptation
Reproduction

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Regulation (Common properties of life)

An ability to control an organisms environment within limits that sustain life (aka homeostasis)

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Energy processing (Common properties of life)

The use of chemical energy to power an organism's actives and chemical reactions

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Order (Common properties of life)

All living things exhibit complex organization

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Response to Environment (Common properties of life)

An ability to respond to environmental stimuli

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Growth and development (Common properties of life)

Consistent growth and development controlled by inherited DNA

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Evolutionary adaptation (Common properties of life)

Adaptations evolve over many generations as individuals with traits best suited to their environments have greater reproductive success and pass their traits to offspring

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Reproduction (Common properties of life)

The ability of organisms to reproduce their on kind

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Hierarchy of organization (largest to smallest)

Biosphere
Ecosystem
Community
Population
Organism
Organ system
Organ
Tissue
Cell
Organelle
Molecule
Atom

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Biosphere

All of the environments on the Earth that support life

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Ecosystem

All the organisms living in a particular area and the physical components with which the organisms interact

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Community

The entire array of organisms living in a particular ecosystem

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Population

All the individuals of a species living in a specific area

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Organism

An individual living thing composed of many organ systems that function together

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Organ system

Several organs that cooperate in a specific function(s)

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Organ

A structure that is composed of tissues and that provides a specific function for the organism

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Tissue

A group of similar cells that perform a specific function

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Cell

The fundamental unit of life

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Organelle

Subunits of cells that perform specific functions

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Molecule

A cluster of small chemical units called atoms held together by chemical bonds

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Atom

Smallest unit of matter that retains unique properties of an element