what does biology mean?
how many characteristics of life are there?
What are the characteristics of life?
- made of cells
- they grow
- require energy
- all living things change through time
What is the name for an organism that contains only one cell; for an organism with multiple cells?
What is the final stage of development in an organism called?
What are the two kinds of reproduction and what are their differences?
- asexual-one parent
- sexual-two parents
What is homeostasis?
the balanced internal conditions in a cell.
What happens when a species changes through time?
What is the process when a population changes and the weak die out?
What is a major theme in biology, __________ and __________ in life?
What is "the genetic code?"
What does the tree of life show?
That all organisms are descended from a common ancestor.
What are the three parts of the tree of life?
- Archea, specific bacteria, special conditions
What is ecology?
- Interdependance of organisms-
- dependent on each other
- dependent on physical environment
What two things that organisms are dependent on?
each other and the physical environment
What does natural selection determine?
Which traits are favorable.
What does natural selection lead to?
survival and reproduction
What explains the diversity of life?
adaptations to the environment.
What does pure science ask?
What does applied science explain?
the effect on humans
What does applied science need?
ethics and morality
Is science a process?
How many steps are there in the scientific process?
What are the steps in the scientific process?
- 1.make observations
- 2.make a prediction
- 5.collect data
- 7.peer review and publication
- 8.made into a theory
Explain the step: make observation
observe, leads to questions
Explain the step: make a prediction
predict the outcome of your experiment before begin
Explain the step: hypothesis
- a hypothesis is a scientific eplanation for observations
- an educated guess on the outcome of an experiment
Explain the step: collect data
- data is numerical facts
- tables and/or graphs
Explain the step: conclusion
it either supports or rejects the hypothesis.
Explain the step: peer review and publication
send your results to other scientists and have them review it. If their results are the same, publish your work
Explain the step: theory
after your work is published, if the work is sucessful over and over again, it is regarded as theory untill it is disproven
What is biased?
basing idea on personal belief rather than science.
______ peer review is necessary.
How many lenses does a microscope have?
What are the lenses called?
the objective and ocular lenses.
How is total magnification calculated?
ocular lens times objective lens. Ocular is 10x and objective is normaly 10/20/40
What kind of microscope has two lenses?
compound light microscope
In the 1600s who made the first compound light microscope?
Anton van Leewenhoek
What is resolution?
The ability to distiguish between two objects clearly. magnification up, resolution down.
Besides a compound light microscope, what is the only other kind?