Living vs Nonliving The Characteristics of Life All

All Living Things… • Maintain Homeostasis • Require energy for gas exchange and other

Cells • Cells are the basic components of all living things. Some organisms are

Require Energy • All organisms must maintain stable internal conditions while living in a

Reproduction • Reproduction is sexual or asexual. – Sexual reproduction involves two parents that

Heredity • Living organisms inherit traits from the parent organisms that created them.

Response to Stimuli • A stimulus is a change in an organism’s surroundings that

Viruses • Viruses are not plants, animals, or bacteria. They are not living. •

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Living vs. Non-living The Characteristics of Life

All Living Things… • Maintain Homeostasis • Require energy for gas exchange and other activities • Stimulus response • Growth and Development • Reproduce • Are Composed of Cells • Display Heredity

Cells • Cells are the basic components of all living things. Some organisms are single-celled or unicellular (bacteria) and some organisms are multi-cellular (humans). • Cell growth can include size of cells or number of cells.

Require Energy • All organisms must maintain stable internal conditions while living in a constantly changing external environment. (Homeostasis) • Energy to carry out activities such as respiration (gas exchange). • All organisms must be able to obtain and use resources, grow, reproduce, and maintain homeostasis.

Reproduction • Reproduction is sexual or asexual. – Sexual reproduction involves two parents that combine their genetic material. – Asexual reproduction involves only one parent and produces identical offspring.

Heredity • Living organisms inherit traits from the parent organisms that created them.

Response to Stimuli • A stimulus is a change in an organism’s surroundings that causes them to react. • All organisms respond to their environment.

Viruses • Viruses are not plants, animals, or bacteria. They are not living. • They do have reproductive abilities, but they only reproduce within a living cell. • They have to have a host.