What is Life? Levels of Organization Activity Characteristics of Living Things

What is Life?

Levels of Organization Activity

Characteristics of Living Things

Using your books…

• Summarize the levels of organization activity by finding the chart to the right and copying levels and examples into your notes.

Brainstorm first…

• What must so-called living things do to be living?

What characteristics do the things in these pictures have in common?

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Cells

What characteristics do the things in these pictures have in common?

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Reproduction

What characteristics do the things in these pictures have in common?

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Based on Genetic Code

What characteristics do the things in these pictures have in common?

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Growth and Development

What characteristics do the things in these pictures have in common?

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Need for Materials and Energy

What characteristics do the things in these pictures have in common?

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Response to Environment

What characteristics do the things in these pictures have in common?

• Notetaking Tip --- list descriptions of pictures in your notes QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Maintaining Internal Balance

What characteristics do the things in these pictures have in common?

• Notetaking Tip --- list descriptions of pictures in your notes QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

QuickTime™ and aTIFF (Uncompressed) decompressor

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QuickTime™ and aTIFF (Uncompressed) decompressor

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QuickTime™ and aTIFF (Uncompressed) decompressor

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Evolution

Characteristics of Living Things

• Made of cells• Reproduce• Based on a genetic code (DNA)• Grow and Develop• Need Materials and Energy• Respond to Stimuli (Environment)• Maintain an Internal Balance (homeostasis)• Evolve/Adapt over time

To clarify…

• To each characteristic add your own notes based on the in-class discussion and book reading.

To practice…

• For homework, answer the virus question. This is a good test type question to see if you know and understand the characteristics of living things!

Sample in class additional notes…

• Made of cells: Unicellular--one cell; Multicellular--many cells with different functions.

• Reproduce: Asexual--one organism makes exact copy; sexual--two organisms forms new combinations of genes.

• Based on a genetic code: DNA

Continued…

• Grow and Develop: Growth--size of cells, number of cells. Development--specialization of cells.

• Need materials and energy: Autotrophs--can convert light energy into chemical energy. Heterotrophs--get their chemical energy from other organisms.

• Respond to stimuli: ex. Plant grows towards sun. Movement fits here, but movement is NOT a characteristic of all living things!

Finished!

• Maintain and Internal Balance: Ex. Regulate temperature by sweating and shivering.

• Evolve: Changes in the genetic code create diversity among living things. In certain environments a particular trait provides and advantage and more individuals with that trait survive and reproduce. Over time, species change in response to environmental pressure.