Transcript What is a cell? - Campbell County Schools

CELLS
Groups
• 1s- pg 30-31
Compare and contrast multi-cellular and uni-cellular.
• 2s- pg 32-33
How were cells discovered and explain the cell
theory.
• 3s pg 34-35
Compare and contrast the major differences
between plant and animal cells.
What feature typically makes plant cells boxy
looking?
• 4s Pg 38-39
Explain how multi-cellular organisms grow.
Why can a cell only get so large???
What is a cell?
* The smallest unit that can carry out
the activities of life!
* The building blocks of all life!
Jobs of cells
• Even though they are tiny, each cell has
everything it needs to survive and
reproduce
• Each part of the cell has a special job to
do!
DNA
Nucleus
Cell Theory
1.All living things are made of
one or more cells.
2.Cells are the basic unit of
living things.
3.All cells come from existing
cells.
Unicellular
Multi-Cellular
ONLY 1 cell that
performs all jobs
necessary to sustain
the life of the cell
Has 2 or more cells
that have specialized
jobs
http://www.youtube.com/watch?v=gKNzzxuz6uk&
NR=1
Amoeba
http://www.youtube.com/watch?v=RaAM8qQcs6
E
Elodea
2 Types of cells
Plant
Animal
Animal cell
Animal cells are
eukaryotes (have
a nucleus)
Do NOT have a cell
wall or chloroplast
Millions of different
types
Can’t make their
own food
Plant Cell
Have chloroplast
and a cell wall
Plant cells are
eukaryotes
(have nucleus)
Plant cells make
there own food
through
photosynthesis
Growing…
• As multi-cellular
organisms grow, the
cells increase in
number!
• http://www.youtube.co
m/watch?v=rgLJrvoX
_qo&feature=related
• Chromosomes have
all the information to
divide
Why so small????
To stay a live,
cells
Must take in
oxygen
Absorb food
Release
waste
Big Cell =
1. Need more food!
2. Too big to get rid of
waste in time!
3. Big Pop! It’s not
comin’ back!
http://www.youtube.com/watc
h?v=TdMIsCF_7p0&feature=
related
Journal….
1. Explain
the difference between
multi-cellular and unicellular
(slide 6)
1. Describe the difference between
a plant and an animal cell. (slide
7)
2. How do multi-cellular organisms
grow? Why? (slide 10)