Study Guides (248,412)
Canada (121,545)
Biology (475)

Bio notes Chapter 1 EXAM.docx

5 Pages
Unlock Document

Lovaye Kajiura

Bio notes Chapter 1 What is life? Biology-Bio=Life Logy=study of Why is Biology Important?  Helps you understand body functions  Allows you to be an informed science citizen  Career opportunities  Enriches appreciation of the Earth and its inhabitants Similar characteristics shared by all living things  Organisms acquire and use materials and energy  Organism actively maintain organized complexity  Organisms perceive and respond to stimuli  Organism grow  Organism produce  Organisms have the collective capacity to evolve Non- living things may possess some of these characteristics Crystal--- grow Computers---use and acquire energy But only living things can do it all Organisms acquire and use materials and energy  Obtain material that make up their body, such as minerals, water and other simple chemical building blocks from; air, water ,soil from bodies of other organism  Life neither destroys matter or creates  Materials are continuously exchanged and recycled among organisms and surroundings  Energy is required to move and to construct the complex molecules that make up an organisms body. Organisms actively maintain Organized Complexity  Organisms tend to disintegrate into chaos unless energy is used to maintain it  Organisms must use energy to maintain themselves  Ex. Membrane pumps some chemicals in and others out  Ex. People and mammals use energy to keep internal organs a t a warm constant temp that allows the proper reactions to occur in their cells  Organisms maintain relatively constant internal conditions Organisms perceive and respond to stimuli  To obtain energy and nutrients and to stay alive, organism must perceive and respond to their environments.  Animals use specialized cells to detect light, temperature, sound ,gravity, touch, chemicals and many other stimuli.  Ex. Low blood sugar(internal stimulus) detected by brain mouth waters at the smell of food(external stimulus)  Plants, fungi and single celled organism use very different mechanisms that are equally effective for their needs. Organisms Grow  Growth requires organisms to obtain material and energy from outside world.  Single celled organism such as bacteria grow to about double their original size, copy their genetic material and divide in half to reproduce  Animals and plants use a similar process to produce more cells within their bodies repeating until growth stops.  Individual cells also contribute by increasing in size  Muscles & Fat cells in animals  Food storage cells in plants Organisms Reproduce  Organisms reproduce in a variety of ways  End result is always: New versions of the parent organisms  Offspring inherit the instructions for producing and maintain their particular forms of life  Instruction copied in every cell are carried in the unique structure of the hereditary Molecule Deoxyribonucleic Acid(DNA) AKA THE BLUEPRINT FOR LIFE. Organisms have the collective capacity to evolve  Evolution: The process where modern organism descend from earlier and different forms of life.  Over the course of generations, Changes in DNA are inevitable, resulting in evolution Why is
More Less

Related notes for BIOLOGY 1P03

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.