Characteristics of Life 1
Hooke looked at this under a microscope and saw box like structures named "cells"
Cork
Smallest and simplest level
Cells
Humans
Living
Life must be able to obtain, use and store this
Energy
Composed of DNA/RNA
Genetics
Is this statement part of the cell theory?
"All living things can evolve and come from nonliving substances"
NO!
Largest and most complex
Organism
Plants
Living
All life is made up of one or more of these specialized base units.
Cells
Life must be able to increase in size and/or complexity over a lifetime.
Grow/Develop
All living things are made of cells; plants and animals are made of cells.
Schwann & Schleiden
Virus
Nonliving
Life must be able to make the generation either asexually or sexually.
Reproduction
Life must maintain an internal balance
Homeostasis
The cell is the basic unit of life; cells can be studied scientifically.
Hooke
Life must be able to react to signals from the external environment.
Stimuli
Cells come from cells; diseased cells produce diseased cells
Virchow
List levels of organization & what each are composed of
Cells, Tissue - many cells, Organ - many tissues, Organ system - many organs, Organism - all
Life Changes Throughout Time. Survival of the Fittest and all that.
Evolution