The Characteristics of Life Lecture 2

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The Characteristics of LifeLecture 2

• Cornell Notes

Questions
Notes
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Whats the difference between living and
non-living things?

• All living things share 8 things in common.

http//askabiologist.asu.edu/research/ecosystems/i
mages/ecosystem_movement.jpg
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2)
(1 parent)
johnfriedmann.com/biogloss/fission.gif
(2 parents)
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3) All living things have a universal genetic
code.
Offspring generally resemble their parents. The
directions for inheritance are carried by
deoxyribonucleic acid, or DNA.
http//wmworia.files.wordpress.com/2007/11/23chrom
osomes.jpg
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4)

• Growth means that cells increase in size and/or
  number. In multicellular organisms, they
  differentiate to form specialized structures.
  Growth and development are determined by the
  genetic code (DNA).

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5)
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6) All living things respond to their
environment.
Stimulus a signal to which an organism responds.

• Irritability

• Irritability - immediate response to a stimulus.

http//upload.wikimedia.org/wikipedia/commons/arch
ive/c/ce/20070829094824!Meal_worm_in_venus_fly_tra
p.jpg
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Adaptation - an inherited behavior or
characteristic that enables an organism to
survive reproduce.
7) All living things change over time.
http//3.bp.blogspot.com/_mmBw3uzPnJI/SWIxYwCvgKI/
AAAAAAAAfD4/Te9JS3FSvZs/s400/animal-camouflage-01.
jpg

• Over time, populations (groups of organisms)
  characteristics change, or evolve.

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8) All living things maintain an internal
balance.

• Homeostasis - the ability of an organism to
  maintain its internal environment despite
  conditions in the external environment.
• Human body temperature is
• if body temperature rises, you sweat.
• if body temperature lowers, you shiver.

http//tell.fll.purdue.edu/JapanProj/FLClipart/Med
ical/sweat.gif
http//i.ehow.com/images/GlobalPhoto/Articles/4853
542/141441-main_Full.jpg
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In order for something to be considered a living
thing, it must have all eight of these
characteristics, not just some of them!
Quiz Is a computer living? Why or why not?
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Summary Write a 4-5 sentence paragraph
summarizing what you learned today from the
lecture. Be sure to include the most important
details and key vocabulary in your
summary. Questions Write at least 8 study
questions in the margin of your Cornell notes.