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1. Basic unit is the cell 2. Reproduce 3. Have DNA 4. Grow & develop 5. Obtain & use energy 6. Respond to their environment 7. Maintain homeostasis 8. AS A GROUP, living things change over time (evolve) 2

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 Cells are the smallest living unit of organisms.  Cells are complex and highly organized.  Organisms may be composed of a single cell (like bacteria) or many cells (like plants, animals, and fungi). 4

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 Sexual Reproduction  Involves 2 parents  Egg fertilized by sperm to make a ZYGOTE  Offspring DIFFERENT from parents 6

 Asexual reproduction  Involves a single organism or cell  Cell divides  Offspring IDENTICAL to parent 7

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 DNA (deoxyribose nucleic acid) carries the genetic code for all organisms  All organisms contain DNA  DNA codes for the proteins that make up cells & do all the work 9

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 Organisms grow by producing more cells & by cell enlargement  Organisms develop as they mature into an adult organism  Monarch to chrysalis Monarch to chrysalis 11

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 Autotrophs can make their own food  Heterotrophs can NOT make their own food 13 These cyanobacteria stromatolites are in shark bay, Australia. They are halophiles!

 Organisms respond to temperature, water, food supplies, etc. in order to survive & reproduce 14

 Keeping the internal environment of the cell or organism within the ranges required for life  Stable internal conditions of pH, temperature, water balance, etc. 15

 Groups of organisms (not individuals) change over time in order to survive within changing environments.  Fossil records show changes in groups of organisms 16

 Atoms  Molecules  Organelles  Cells – life starts here  Tissues  Organs  Organ System  Organism  Population  Community  Ecosystem  biosphere 17

 Boston Dynamics Boston Dynamics 18