Download Prokaryotic and Eukaryotic Cells

Name____________________________________Date_____Period___
HBiology
Intro to Cells WS
7.1 Life is Cellular
Read pages 189-194 and answer the following questions. If someone is NOT in your book, LOOK them up
1. Briefly describe how each of the following men contributes to the field of cytology.
Anton van Leeuwenhoek
Robert Hooke
Robert Brown
Matthias Schleiden
Theodore Schwann
Rudolf Virchow
Lorenz Oken
2. Define the term cell.
3. What does the cell theory state?
a.
b.
c.
Prokaryotic and Eukaryotic Cells
All cells have FOUR basic features in common: They are all bounded by a membrane, called a plasma (cell)
membrane. Within the membrane is a semi-fluid substance, cytoplasm, in which organelles are found. All cells
contain chromosomes, carrying genes in the form of DNA. In addition, all cells have ribosomes, tiny organelles
that make proteins according to instructions from the genes.
2 Types of Cells
____________________
(Pro= before, karyon = kernel)
Found in 2 domains: Archaea and Bacteria single celled
No true nucleus; lacks nuclear
envelope/membrane
Genetic material found in nucleoid region
Called Prokaryotes
____________________
(Eu=true, karyon = kernel)
Found in Domain Eukarya (all other Kingdoms):
Animal, Plant, Fungi, Protist
True nucleus; bounded by nuclear
envelope/membrane
Genetic material found within nucleus
Called Eukayotes
Evolved first – 3.5 billion years ago and are very
small 1-10um
Evolved 1.45 billion years ago and are larger 10100um
Lack membrane bound organelles – do contain
ribosomes
Contains cytoplasm with cystol and membranebound organelles
Typical Prokaytoic Cell
Typical Animal Cell
Typical Plant Cell
7.1 Life Is Cellular
For Questions 1–6, complete each statement by writing the correct word or words.
1. The invention of the ___________
made the discovery of cells possible.
2. Robert Hooke used the name
to refer to the tiny empty chambers he saw when he
observed magnified cork.
3. German botanist Matthias Schleiden concluded that ___________
are made of cells.
4. German biologist Theodor Schwann concluded that _____________
5. Rudolph Virchow concluded that new cells are produced from
6. The
are made of cells.
___________.
combines the conclusions made by Schleiden, Schwann, and Virchow.
For Questions 7–9, write True if the statement is true. If the statement is false, change the
underlined word or words to make the statement true.
7. The size of the image formed by a light microscope is unlimited because light
that passes through matter is diffracted.
8. Fluorescent dyes help scientists see the movement of compounds and structures
in living cells.
9. Transmission electron microscopes form a 3-D image of the surface of a
specimen.
Prokaryotes and Eukaryotes
10. Complete the table about the two categories of cells.
Two Categories of Cells
Category
Definition
Size range
Examples
Prokaryotic cells
Eukaryotic cells
11. Which category of cells—prokaryotic or eukaryotic—is your body composed of? ________
Answer the Assessment Questions (including math practice problems) on page 194 in text.