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New Subject!
• For the first quarter, we discussed earth science as it relates to
the atmosphere, weather, and pollution
• For the second quarter, we will discuss life science, otherwise
known as biology!
• Biology is the study of life and living organisms!
Important terms we will be
using all year in biology
• Classification: is a method to group and categorize
organisms into groups
• Just like we classify BOYS & GIRLS or TYPES
OF DOGS
• Organism: Any continuous living thing that is part
of a biotic environment
• Organisms (living things) are made of cells!
What are cells?
• Write-Pair-Share: What do you believe cells are? How do we
know they exist?
• http://ed.ted.com/lessons/the-wacky-history-of-cell-theory
• Write-Pair-Share: Now that you watched this short video,
describe how we know cells exist
CELL THEORY!
1. All living things are made of cells
2. They grow and reproduce
3. Cells are basic unit of living things
Vocabulary (read BEFORE
writing!)
• Organelle: A tiny structure inside a cell that
carries out a specific function within a cell.
• Eukaryote: The type of organism that has a
nucleus and contains membrane-bound
organelles. Eu = DO!
• Prokaryote: The type of organism that DOES NOT
have a nucleus or contain membrane-bound
organelles. Pro = NO (nucleus)!
• Unicellular: A living organism made of only ONE
cell.
• Multicellular: A living organism made of MORE
than one cell.
Prokaryotic vs. Eukaryotic
Prokaryotic
Prokaryotes are unicellular organisms= made up of one cell
= 1 cell
For example, bacteria
can be prokaryotic
Eukaryotic
Eukaryotes are multi-cellular organisms = made up of multiple
cells
Some eukaryotes, like
humans, are made of
billions of cells, and
hundreds types of
cells!
Prokaryotic vs. Eukaryotic
No nucleus
Nucleus with a
membrane/envelope
Prokaryotic vs. Eukaryotic
Most
prokaryotic
cells have
flagellum,
tails for
mobility
THINK-PAIR-SHARE
• Most prokaryotic cells have a flagella or tail for
movement, while eukaryotic cells do not. Why would
prokaryotic cells need to move a lot?
The size of cells…
Prokaryotic vs. Eukaryotic
 Prokaryotic organisms are
made up of a single-cell
 Prokaryotic have a few
simple cell structures
Prokaryotic organisms have
no bound nucleus, called a
nucleoid
 Eukaryotic organisms are
made up of multiple cells
combined together to make
structures (like humans!)
 Eukaryotic organisms have
complicated cell organelles
 Eukaryotic organisms have
a bound nucleus