Flashcards in CH 3.1-3.2 TEST Review Deck (47)
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1
What is the smallest unit of life?
cell
2
What is the difference between a compound and simple lens microscope?
compound has several lens, simple has only 1 lens
3
Who discovered and named cells by examining bark?
Hooke
4
Who viewed the first living cell with a simple lens microscope?
Leeuwenhoek
5
Who concluded that plants were made of cells?
Schleiden
6
Who concluded that animals were made of cells?
Schwann
7
Who proposed that cells come from other cells?
Virchow
8
What are the 3 things stated in cell theory?
1. all living things are made of cells
2. Cells are the smallest part of living things that are still alive
3. All cells come from pre-existing cells
9
What does unicellular mean?
organism made of one cell
10
What does multicellular mean?
organism made of many cells
11
What type of cells do not have a nucleus or membrane bound organelles?
prokaryotes
12
What type of cells have a nucleus and membrane bound organelles?
eukaryotes
13
What is the only organelle found in prokarytoes?
ribosomes
14
What types of organisms are prokaryotic?
bacteria
15
What type of organisms are eukaryotic?
plants, animals, fungi, protists
16
What is the maximum magnification of a modern compound light microscope?
1000X
17
What limits the magnification abilities of light microscopes?
light
18
What is the magnification of an electron microscope?
over 500,000X
19
What are some pros to using light over electron microscopes?
can view living specimens
cheaper
portable
20
What are some cons to using electron microscopes?
can only view non-living speciemens
expensive
large
21
Which type of microscope requires that the specimen be dehydrated and placed in a vacuum?
electron microscope
22
Which type of electron microscope shows 3D images of the surface of cells?
scanning
23
Which type of electron microscope can show the internal organelles of the cell?
transmission
24
Which organelle provides support and shapes the cell, aids in cell movement, provides strength?
cytoskeleton
25
What are the 3 fibers that make up the cytoskeleton?
microtubules
intermediate filaments
microfilaments
26
What is the fluid portion inside the cell called?
cytosol
27
What structure contains the organelles and serves as the site for many chemical reactions?
cytoplasm
28
Where is the DNA stored?
nucleus
29
What is the membrane that surrounds the nucleus called?
nuclear membrane
30
