basics of bio Flashcards
What does the study of biology include?
The living world
Define ‘experiment’
testing a hypothesis
Define ‘hypothesis’
testable educated guess
Define ‘Analysis’
using data to draw conclusions
Define ‘Conclusion’
accepting or rejecting a hypothesis
Define ‘Variable’
a factor in an experiment
Define ‘independent variable’
The manipulated variable, what is changed on purpose “I changed it”
Define ‘dependent variable’
The responding variable, what is measured as a result of the IV
Define ‘Control group’
The group that is normal, unchanged, and is compared to the experimental groups.
What is the benefit of performing a controlled experiment?.
It isolates one factor in a hypothesis that will be tested in the experiment
How is an independent variable different from a dependent variable?.
while Independent is changed, dependent measures results of that change
What is a quantitative observation?
Using numbers; ex. 15 feet
What is a qualitative observation?
Using 5 senses, descriptions; ex. pink, smooth
Why is it important to use a control group in an experiment?
To assure valid results, you need to compare data to data of control group
What are the characteristics of life (what characteristics do all living things share)? List and describe each characteristic.
1) built off of Cells (uni or multicellular), 2) response-(changing due to stimulus), 3) homeostasis (maintaining balance), 4)growth and development, 5) Evolve/Adapt (change over time), 6) has DNA (universal genetic code) 7) reproduction (asexual or sexual)
schredg
What conditions are necessary for an individual organism to survive? What conditions are necessary for a population of organisms to survive?
maintaining homeostasis and the characteristics of life — Enough of the population (not all) reproduce
What does homeostasis mean?
maintaining balance
What happens if homeostasis is disrupted
death
what is the basic unit of life
cells
Define ‘evolution’
change over time
What is the biosphere? What does the biosphere include?
The biosphere is the parts of the world where life exists. It includes atmosphere, land, water
what are the parts of a microscope
Ocular (eyepiece), low, mid, and high power objectives, arm, base, stage, stage clips, revolving nosepiece, diaphragm, light source.
Calculating total magnification: multiply the eyepiece (ocular) by the objective power. WHAT THIS EVEN MEAN?
How does one properly make a wet mount slide? How should the coverslip be lowered onto the microscope slide?
Obtain slide, place specimen, drop of water, coverslip – The cover slip should be dropped slowly at a 45 degree angle to prevent bubbles
What is the cell theory?
A set of statements describing cells as a characteristic of life.
What three things cell theory state?
Cells are the basic unit of life, all living things have cells, new cells, come from cells.
What invention was key to the development of the cell theory?
microscope
What are the steps of the scientific method
1)identify the problem 2)research the problem 3)Make a hypothesis 4) test the hypothesis 5) observe and record 6) arrive at a conclusion
