Scientific Method
What is a hypothesis?
An educated guess based on observation
In biology, what is another name for a 'living thing'?
An organism
What part of the cell controls the activity of the cell?
The nucleus
What is the name of the liquid part of the cell in which organelles are suspended
Cytoplasm
If the magnification of the eyepiece lens is X10 and the magnification of the objective lens is X40, what is the total magnification results when a slide is viewed?
x400
This type of variable is deliberately changed by the experimenter to test its effect.
The independent variable
What is metabolism?
The sum of all chemical reactions in an organism
Mitochondria
What cell organelle is responsible for photosynthesis?
Chloroplast
What part of the microscope supports the slide?
What is the purpose of replicating an experiment?
To ensure accuracy and reliability // verify the results of the experiment // make sure the results are the same every time
Define the term "excretion"
What 2 components are cell membranes made of?
Phospholipids and proteins
What is the function of the ribosome?
Makes proteins
Name the stain that you used when examining a plant cell under the microscope.
iodine
In this type of test, neither the participants nor the researchers know who is receiving the treatment or the placebo, to eliminate bias.
Double blind testing
Name the characteristic that ensures the survival of a species
Reproduction
Cell membranes are selectively permeable. Describe what this means
The cell membranes allow some but not all substances to pass through
In biology, what is a tissue?
A group of cells working together with similar functions
Name the stain that you used when examining an animal cell under the microscope.
Methylene blue
What are the following all examples of:
* human error // * accidental discovery // * ethical issues // *extent of basic knowledge
Limitations of the scientific method
Define the characteristic "response"
the ability of organisms to react to both internal and external stimuli
Give one structural difference between an eukaryotic and prokaryotic cells
Eukaryotic: Has a nucleus // membrane bound organelles // larger // can be unicellular or multicellular
Prokaryotic: Has no nucleus // no membrane bound organelles // smaller // only unicellular
What type of cell is a bacteria cell?
Prokaryotic
What is the purpose of a coverslip?
To prevent the specimen from drying out // protection