CHARACTERISTICS OF LIFE 1 ALL LIVING THINGS SHARE

CHARACTERISTICS OF LIFE 1

ALL LIVING THINGS SHARE COMMON CHARACTERISTICS 1. 2. 3. 4. 5. 6. 7. Basic unit is the cell Reproduce Have DNA Grow & develop Obtain & use energy Respond to their environment Maintain homeostasis 2

CHARACTERISTICS OF ORGANISMS 3

ALL ORGANISMS ARE MADE OF CELLS 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 4

ORGANISMS REPRODUCE TO PASS ON THEIR GENETIC TRAITS 5

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

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

ALL ORGANISMS HAVE DNA 8

ALL ORGANISMS HAVE DNA (deoxyribose nucleic acid) carries the genetic code for all organisms All organisms contain DNA codes for the proteins that 9

ORGANISMS GROW & DEVELOP 10

ORGANISMS GROW AND DEVELOP Organisms grow by producing more cells & by cell enlargement Organisms develop as they mature into an adult organism Monarch to chrysalis 11

ORGANISMS REQUIRE FOOD & ENERGY 12

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

ORGANISMS RESPOND TO THEIR ENVIRONMENT Organisms respond to temperature, water, food supplies, etc. in order to survive & reproduce 14

HOMEOSTASIS Keeping the internal environment of the cell or organism within the ranges required for life Stable internal conditions of p. H, temperature, 15

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

LIFE IS ORGANIZED ON SEVERAL LEVELS Atoms Molecules Organelles Cells – life starts here Tissues Organ System Organism Population Community Ecosystem biosphere 17

Boston Dynamics 18