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25 Cards in this Set
- Front
- Back
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Independent Variable
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The thing that was changed in an experiment
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What are the 7 characteristics of life?
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-Cells and organization
-Homeostasis -Reproduction -Energy Use -Growth -response to a stimulus -Change over time |
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Dependent Variable
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The thing that was measured in an experiment
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Describe prokaryotes and give an example
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Simple cells
no nucleus not many organelles Bacteria are an example |
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Describe eukaryotes and give an example
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More complex cells
Have a nucleus Have many organelles Animal and Plant cells are examples |
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Selectively Permeable
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Only allowing certain things in and out of the cell
- The Cell Membrane |
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Things that can diffuse across the membrane
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Very small, not charged
-H2O, O2, CO2 for example -NOT IONS!!! - Not big things like protiens |
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Nucleus
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Controls all the functions of a cell
Contains most of the DNA |
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Mitochondria
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Makes ATP for the cell to be used for energy
Has a double membrane, with the inner one folded back and forth for maximum surface area |
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Ribosome
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Makes proteins for the cell
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Endoplasmic Reticulum
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Transports things throughout the cell
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What will happen if a cell has 1% solute concentration inside, and is placed in a 5% solute solution
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Cell will shrink because there is more salt outside the cell
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What will happen if a cell has 10% solute solution inside, and is placed in a 5% solute solution
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Cell will swell or burst because there is more salt inside the cell
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Passive Transport
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Movement of molecules with no energy required; moves from high to low concentration
Diffusion and Osmosis are examples |
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Active Transport
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Movement of molecules with energy required; moves from low to high concentration
Ion Pumps and Endocytosis are examples |
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Differences between plant and animal cells
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- Plants have chloroplasts, cell walls, large vacuoles, and a rigid boxy shape
- Animal cells are less rigid, have varying shapes, and no cell wall |
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Biochemical Pathway
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A series of reactions where the product of one reaction is used in the next reaction
Light reactions and Calvin Cycle are examples |
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Chloroplast
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Organelle found in plants that is responsible for photosynthesis
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What gas is released in photosynthesis?
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Oxygen gas is released
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What gas is used in photosynthesis?
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Carbon dioxide is used
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Overall Reaction for Photosynthesis
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CO2 + H2O + Light ----> Carbohydrates + O2
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C4 and CAM Plants
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They close or partially close their stomata to prevent water loss
Corn = C4 Cacti = CAM |
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Light intensity's affect on rate of photosynthesis
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Causes the rate to go up and eventually will level off as the light intensity increases
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CO2 affect on rate of photosynthesis
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Causes the rate to go up and eventually will level off as the amount of CO2 goes up
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Temperature's affect on rate of photosynthesis
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Causes the rate to go up and then drop at a certain point as the temperature goes up
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