Characteristics of Life

1—Made up of cells They can be either unicellular or multicellular. ***Unicellular = made up of ONE cell Picture of a unicellular organism. Picture of a Cell ***Multi-cellular = made up of MORE than one cell Picture of multicellular organisms

Many Different types of cells make up the human body:

There are 2 types of reproduction: 1. Asexual 2. Sexual ***asexual = reproduction that requires ONE parent ***sexual = reproduction that requires TWO parents

Necessary for the survival of all living things Why Reproduce?? Necessary for the survival of all living things No Reproduction = No Genes Passed On NO LIFE/Extinction March 2018

3—Based on a genetic code 2 Main Functions of DNA: Replication of Genetic Material Instructions for making proteins (Expression of Genetic Material) ***DNA (Deoxyribonucleic Acid)= genetic code found in every cell. Inherited from parents Controls your traits.

Some Viruses Contain ONLY RNA…

4—Grow and Develop **All living things grow and develop during at least part of their life. Growing means INCREASING IN SIZE ***Think about it . . . Do you look the same as when you were born????

5—Need for materials and energy **Living things need a constant supply of materials and energy. Autotrophs (Producers) get energy from the SUN through PHOTOSYNTHESIS Heterotrophs (Consumers) get energy by EATING METABOLISM- BREAKING DOWN FOOD TO RELEASE ENERGY

6—Response to the environment **Organisms detect and respond to STIMULI (or signals) from their environment. PHOTOTROPISM **Internal stimuli = inside the organism **External stimuli = outside the organism

7—Maintaining internal balance Despite changing conditions around them, organism must keep their internal conditions stable/balanced. **Homeostasis: the process of keeping the internal environment stable/balance/constant

Organisms have the potential to CHANGE OVER TIME 8—Evolution Organisms have the potential to CHANGE OVER TIME

RESPOND TO ENVIRONMENT CHARACTERISTICS OF LIVING ORGANISMS NEED FOR ENERGY RESPOND TO ENVIRONMENT MADE OF CELLS REPRODUCTION CHARACTERISTICS OF LIVING ORGANISMS MAINTAIN HOMEOSTASIS MADE OF DNA EVOLUTION GROW & DEVELOP