Quiz 1 Flashcards
The gene theory
DNA sequences maybe altered during meiosis:
- mutation
- crossing over and segregation
The theory of heredity
Changes in genetic sequences produce heritable variation
-some variations lead to increasing fitness
The theory of evolution
Since the genes of more fit individuals or pass on more readily overtime the differential reproductive success may lead to new species
Evolution is gradual
The Cell Theory
- ) all organisms are made of cells
- ) Cells are the basic unit of life
- ) all cells come from other cells
Compound light microscope
- uses transmitted light only
- higher magnification, lower resolution
- one lens = 2D images
- single objective
Dissecting microscope
- uses transmitted light and reflected light
- lower magnification, higher resolution
- uses 2 lenses = 3D images separate objective for each eye
Scientific Method
Observation Question Hypothesis Experiment Data Analyze results Discussion Conclusion Accept/reject
Independent variable
What you are changing
Ex: ink
Dependent
Measured
Ex: termites
Controlled
Constant for all
- shape
- termites
- paper
Why was the lab important
- Applications of scientific method
- Compound microscope skills
- Dissecting microscope skills
Magnification
Ratio of the size of an image to the size of an object
Diameter of the circular area visible when viewing an object
Field of view
Resolution
Ability to view adjacent objects as distinct structures
