bio quiz-cell history and cell theory Flashcards
First to observe a cell (dead) through a microscope (1655)
ROBERT HOOKE
First to study live cells under microscope (1617)
Anton van Leeuwenhoek
In the 1830’s, botanist Matthias Schleiden and zoologist Theodor Schwann produced the first ideas of what?
cell theory: all the different parts of plants and animals are made up of cells, and that cells can be produced from other cells.
CELL THEORY- 3 POINTS
1. ALL ORGANISMS ARE MADE OF (BLANK)
2. CELLS ARE THE BASIC UNIT OF (BLANK)
3. CELLS ARIVE FROM
1.CELLS
2. LIFE
3. PRE-EXISTING CELLS
SPONTANEOUS GENERATION
THE THEORY THAT BIOTIC LIFE BEGAN FROM ABIOTIC FACTORS
IN 1668 Francesco Redi’s EXPERIMENT TESTED WHAT?
MEAT EXPERIMENT
Chemist Louis
Pasteur (1861) DISPROVED WHAT?
SPONTANEOUS
Smaller, simple
organisms
* NO nucleus
* NO membrane
bound organelles
* Cell division by
binary fission
(ripping its body in
half and making
two of itself)
PROKARYOTIC CELLS
- Generally larger
and more complex
organisms - Have a Nucleus
- Have membrane
bound organelles - Cell division by
mitosis (6 stage
process)
EUKARYOTIC CELLS
A SPECIALIZED SUBUNIT IN A CELL THAT PERFORMS A SPECIFIC TASK
ORGANELLE
ORGANELLES ARE ONLY FOUND IN WHAT KIND OF CELL?
EUKARYOTIC CELLS
Compound light microscopes have 3-4 objective lenses. What are they?
4x, 10x, 40x
(BLANK) are microscope slides that contain freshly collected specimens.
WET MOUNTS
WHAT ARE THE PARTS OF A MICROSCOPE?
- Eyepiece Lens
- Objective Lens
- Arm
- Stage
- Coarse adjustment
- Light source
- Base
DO be careful and
professional in the lab area
* DO take pictures of
specimens
* DO reset the stage and
objective lens before leaving
the microscope
* DO turn off the light source
when done
- DON’T run around in the lab
- DON’T touch the eyepiece lens
- DON’T touch the objective
lenses - DON’T raise the stage on 40x
and crush the slide - DON’T rotate to a higher
magnification while the stage is
raised all the way
