Cells: an overview · 2020. 1. 24. · CELLS: AN OVERVIEW Biology –Unit 1B. CELL THEORY. CELL...
Transcript of Cells: an overview · 2020. 1. 24. · CELLS: AN OVERVIEW Biology –Unit 1B. CELL THEORY. CELL...
CELLS: AN OVERVIEW
Biology – Unit 1B
CELL THEORY
CELL THEORY
Main Point #1:
Cells are the basic unit of life.
As in- Cells are the building blocks
CELL THEORY
Main Point #2:
All living things are
made of cells.
Unicellular organism - ONE celled organism
Multicellular organism- MULTIPLE celled organism
CELL THEORY
Main Point #3:
All cells are made by other living cells.
As in- cells come from cells (mitosis and meiosis)
WHY DOES THAT MATTER?
• How life works
• How disease works
• Cancer
• Depression
• How to treat diseases
PROKARYOTES VS. EUKARYOTES
TWO MAJOR CATEGORIES
OF CELLS
THERE ARE TWO GROUPS OF PROKARYOTIC CELLS: BACTERIA AND
ARCHAEA
This Photo by Unknown Author is licensed under CC BY
PROKARYOTES
PRO rhymes with NO
They’re cells with NO
membrane-bound
organelles.
Prokaryotes also have NO
true nucleus.
MOST PROKARYOTES ARE SINGLE-CELLED ORGANISMS
EUKARYOTES
EU rhymes with DO
They’re cells that DO have membrane-
bound organelles.
EUKARYOTES MAKE UP PLANT, ANIMAL, AND FUNGI
CELLS…
…LIKE THE CELLS OF THIS TREE
ALL CELLS CONTAIN
CYTOPLASM
Cytoplasm is the
jelly-like filling that
both prokaryotes and
eukaryotes have.
ALL CELLS CONTAIN
DNA.
All cells have DNA which is necessary
for all cells to function and
replicate.
THE END