1. Characteristics of Life
A cell is the basic unit of life.
The Cell Theory states that:
All living things are composed of one or more cells.
Cells are the basic unit of structure and function in living things.
All cells come from preexisting cells.
unicellular
multicellular
Asexual vs. Sexual
Unit 1: The Science of Biology

2. Characteristics of Life
Cells come in TWO MAIN CATEGORIES.
Eukaryotes
Prokaryotes
Contain a true nucleus
DNA is enclosed in a membrane
Contain membrane-bound organelles
Don’t contain a true-nucleus
DNA floats freely in cytoplasm
Doesn’t contain membrane-bound organelles.
Unit 1: The Science of Biology

3. Characteristics of Life
All Living Things….
#2 : All living things reproduce.
Unit 1: The Science of Biology

4. Characteristics of Life
Reproduction is important for the continuation of a species.
Organisms can reproduce in one of two ways:
Asexually
Sexually
Unit 1: The Science of Biology