What does the prefix bio mean?

What does the suffix logy mean?

OBJECTIVE

What is a stimulus?

Give an example of a stimulus.

What molecules are combined in photosynthesis?

How do plants obtain energy?

List ways that organisms use energy?

How do growth and development differ?

List the levels of organization from smallest to largest?

Give two examples of homeostasis.

What is the neumonic for remembering the Signs of Life?

SIGNS OF LIFE

   BIOLOGY IS THE STUDY OF LIFE

               Bio=life

                Logy= study of 

Learning Objectives

      you should be able to:

list and discuss the common characteristics shared by all living things.

      no simple definition

     sometimes difficult to determine living or nonliving

      properties that taken together, distinguish the living from the nonliving.

Responds to Stimuli

respond to widely varying stimuli

capacity to respond is a fundamental characteristic of life.

Takes in and uses energy

      take in energy in one form and then convert it to another

Plants use photosynthesis

       combine carbon dioxide and water and store energy

Reproduces

living organisms produce organisms much like themselves.

Grows and Develops

many different patterns of growth and development occur.

Adapted to the Environment

highly adapted to fit into the environment in which they live.

Highly Organized

Living organisms are highly organized.

         Subatomic particles

         Atoms

         Molecules

         Organelles

         Cells

         Tissues

         Organs

         Organ systems

         Organism

         Population

         Community

         Ecosystem

Maintains Homeostasis

keep a relatively constant internal chemical composition.

 Ex.  human kidney conserves water and keeps substances in the blood at equilibrium.

  Ex. human temperature fluctuates around 98.6 degrees Celsius.

RARE HOG

Summary

Living organisms show so much variation that there is no definition of life.  Instead we must look at how many of the characteristics of life an organism shows o determine if it is alive.