Flashcards in LAB 1 Deck (32)
small mass of genetically identical cells
isolated group of genetically identical cells
solution or solid with nutrients so that cells can grow/ divide.
It can be a liquid or a mixed with something to solidify it.
ex: Agar plate= solid medium that helps cells grow and divide.
- dense, even layer of bacteria.
LIGHT MICROSCOPE (includes 3 lenses)
Light from light source shines on specimen and lenses magnify the image.
Focuses light from light source to specimen.
Magnifies image on specimen
Magnifies image+ INVERTS it for better viewing.CONTAINS MICROMETER
FIELD IRIS DIAPHRAGM
Iris that controls the light that enters the lens system. Decreasing Light improves contrast.
Difference between light and dark areas. Can make translucent images stand out.
COURSE FOCUS KNOB
Moves Stage up and down. Only used for LOW power lenses.
FINE FOCUS KNOB
Bring image to SHARPER focus under Low power. HIGH power lenses.
Tube that contains a prism that allows light to pass from objective lens to ocular lens.
Distance between your pupils. Incorrectly set can cause eye strain, incorrect measurements, and may affect microscope’s ability to be par-focal
Objective lens X Ocular lens
eg: 40/0.2= Objective magnifies image 40 times its actual size.
objective lens can be changed without having to refocus microscope
Differentiates two adjacent points as being different.
minimum distance required for two objects to be seen as separate.
educated guess that predicts the answer to your question
factors which are kept constant throughout the experiment
variable of that is MANIPULATED
RESULT OF MANIPULATION
measures the effect of Independent variable(manipulated variable) on the dependent variable.
examines dependent variable in the absence of the independent variable.
SOLVENT CONTROL GROUP
examines solvent in experiment. Makes sure that the effect on the dependent variable is only due to the independent variable and not due to the solvent.
water movement from area of [low solute] to [high solute]
Plants, prokaryotes, protists have cell walls that constrict the cytoplasm size and prevent plasma membrane from rupturing.
SOLUTION with [LOW SOLUTE] than cell. TURGID: cell swells due to water entering the cell.
SOLUTION with [HIGH SOLUTE] than cell. Plasmolysis: cell shrinks as water leaves the cell, Plasma membrane disrupted and cell dies.
SOLUTION with same [SOLUTE] as cell. FLACCID: no net mvmt of water, low pressure on cell wall.