1. What is the science of biology?
Aim: How do we know the difference
between living and nonliving things?
What is the science of biology?
Biology is the “study of life.”

2. CHARACTERISTICS OF LIFE
Cells: Basic units of structure & function
Metabolism: Chemical reactions in cells
Homeostasis: Internal Balance
Reproduction: Produce offspring
Based on Universal Genetic Code-DNA

3. All Living Things Are Made Up of
One or More Cells

4. ENERGY and METABOLISM Energy is required to maintain life and for
growth & development.
Metabolism includes all
of the chemical reactions
that occur in an
organism.

5. HOMEOSTASIS Homeostasis is the ability homeo - Constant (same)
stasis – balance
Homeostasis is the ability
of the body to maintain a
relatively constant internal
condition, regardless of the
external environment.

6. REPRODUCTION
What do all these images have in common? How are they different?
Reproduction: the ability of an organism to produce a NEW organism.

7. Eight Life Functions Nutrition Transport Cell Respiration Excretion
Synthesis
Regulation
Growth
Reproduction

8. NUTRITION
All organisms get nutrients through food!

9. Transport
Organisms circulate and absorb materials through the cells (food and waste)

10. Cell Respiration
Chemical energy stored in nutrients is released during cellular respiration
Aerobic –
Anaerobic-
Cell respiration in the presence of
oxygen producing energy.
Cell respiration where oxygen is not present producing energy.

11. Excretion
Get rid of Metabolic (cell) waste &
toxic materials.

12. SYNTHESIS
To make or to build from small to large.

13. REGULATION
Control & coordination of all life processes (Homeostasis)

14. Increasing the size or number of cells.
GROWTH
Increasing the size or number of cells.

15. REPRODUCTION
What do all these images have in common? How are they different?
Reproduction: the ability of an organism to produce a NEW organism.

16. Features of Life
List 4 characteristics that scientist look for when they want to determine life:
____________________________
Label the life characteristic that is represented in each diagram.
A mission to Mars has found a specimen and brought it back to Earth. As a biologist, your job is to figure out if the following specimens is living or non living. Explain how you will determine whether it is living or non living. (use complete sentences)
Cells: Basic units of structure & function
Metabolism: Chemical reactions in cells
Homeostasis: Internal Balance
Reproduction: Produce offspring
Under a microscope
Synthesis
Regulation
Reproduction
Transport
Excretion
Growth
Nutrition
Respiration
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Living things are made of cells. Living things obtain and use energy.
Living things grow and develop. Living things reproduce.
Living things respond to their environment. Living things adapt to their environment.