CHARACTERISTICS of LIFE

JRMG 2009

Made up of cells

• lowest structural level• unicellular or multicellular• prokaryotic or eukaryotic• plant or animal

Based on Genetic code

• what is DNA?– Units of inheritance– Double stranded– With four nucleotides • (Guanine, Adenine, Thymine, Cytosine)

Reproduce

• Proliferation of species• Asexual vs. Sexual reproduction

Grow and Develop

Obtain and use materials for energy

• Metabolism Types–Anabolism• Involves putting together• Simpler to complex

substance• PHOTOSYNTHESIS

–Catabolism• Complex to simple

substances• Release of energy• DIGESTION

Response to the environment

• Stimulus– anything in the environment that

causes an organism to react– Light, Temperature, Odor , Sound,

Gravity , Heat , Pressure

Maintain internal balance

• Homeostasis– process by which organisms

respond to stimuli in ways that keep conditions in their body suitable for life

EVOLVE

EVOLUTION