Characteristics of LifeGALLERY WALK

What is Life?

Know the 8 characteristics of life!

For example, Robert Hooke observed the First Cells

cork through an early microscope- illustration shown on the left.

Hooke called the individual units cells, after the monk’s rooms in a monastery.Source:

http://www.ucmp.berkeley.edu/history/hooke.html

Cork Cells

Compare the photograph of cork cells viewed through a modern light microscope to Hooke’s drawing.

Source: http://biology.clc.uc.edu/Fankhauser/Labs/Cell_Biology/Cells_Lab/cork_100x_PA021953c.JPG

Plant Cell Light Microscope

Source: http://www.umanitoba.ca/faculties/science/biological_sciences/lab3/images/lightplt.jpeg

Animal Cell Light Image

Source: http://www.umanitoba.ca/faculties/science/biological_sciences/lab3/images/lightani.jpeg

Animal Cell EM Image

Source: http://www.umanitoba.ca/faculties/science/biological_sciences/lab3/images/eukanimal5.jpeg

Animal Tissue

Source: http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20Laboratory/animal%20tissues/img001.jpg

Plant Tissue

Source: http://ccollege.hccs.cc.tx.us/instru/Biology/AllStudyPages/Cells/Images/ELODIA400_labeled.jpg

What two structures do plant cells have that animal cells lack?

The cell is the basic unit of life.

Anton van Leeuwenhoek (1632-1723)

Single Cell Life Form

Source: http://www.umanitoba.ca/faculties/science/biological_sciences/lab3/images/bacillus.gif

Cells come from cells.

Rudolf Ludwig Karl Virchow (1821 - 1902)

so…to review cell theory

1. All life forms are made from one or more cells.

2. Cells only arise from pre-existing cells.

3. The cell is the smallest form of life.

cellstissuesorganssystemsindividualspopulationscommunitiesecosystemsbiosphere

SMALL

LARGE

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=Tb6TkeKObNNRcM&tbnid=5yFhthlCF1OJhM:&ved=0CAUQjRw&url=http://www.vtaide.com/png/livingthings2.htm&ei=wXtEUqaBIcGG2wXRvIHQAw&bvm=bv.53217764,d.b2I&psig=AFQjCNEV_5zvHtY_E0cn-casK9V4MgS7Fw&ust=1380306238738784

Living Things Reproduce All living things come from other living things. For example, a zebra

will produce offspring through sexual reproduction.

For example, you inherit part of your parents DNA which determine things like hair color and eye color.

For example, children age as the years progress

Living Things Metabolize

For example, your body needs food in order to break it down into smaller particles so your cells can use it for energy!

Respond to Stimuli For example: your body reacts when you

touch something hot or something that hurts. Nerves send signals to your brain that tells your brain to stop activity.

For example

Your body tries to maintain homeostasis when you are sick with a fever. You may sweat in order to cool down your internal body temperature.

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=RI2xO9uOEHs_QM&tbnid=MLHtFfkSW2V-0M:&ved=0CAUQjRw&url=http://blog.p2pfoundation.net/technology-and-evolution-how-software-evolves/2010/07/27&ei=B3xEUqP7EqGK2gWRzYC4Dg&bvm=bv.53217764,d.b2I&psig=AFQjCNFTf_Izvo9deoJNVNSy-JC9XRqTlA&ust=1380306284984893

Living Things Evolve

For example, Dinosaurs with feathers - In northern China, evidence was found of feathered dinosaurs that did not fly. The feathers may have been for insulation or looks, but not for flying.