TCAP Review. Prokaryotic Cells No membrane bound nucleus Nucleoid = region of DNA concentration...
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Transcript of TCAP Review. Prokaryotic Cells No membrane bound nucleus Nucleoid = region of DNA concentration...
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TCAP Review
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Prokaryotic Cells
• No membrane bound nucleus• Nucleoid = region of DNA concentration• Organelles not bound by membranes
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Eukaryotic Cells• Nucleus bound by membrane• Include fungi, protists, plant,
and animal cells• Possess many organelles
Protozoan
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Passive Transport
• No energy required
• Move due to gradient– differences in concentration, pressure, charge
• Move to equalize gradient– High moves toward low
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Diffusion
• Molecules move to equalize concentration
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Osmosis
• Special form of diffusion
• Fluid flows from lower solute concentration
• Often involves movement of water– Into cell– Out of cell
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Solution Differences & Cells• solvent + solute = solution• Hypotonic
– Solutes in cell more than outside– Outside solvent will flow into cell
• Isotonic– Solutes equal inside & out of cell
• Hypertonic– Solutes greater outside cell– Fluid will flow out of cell
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Photosynthesis
Respiration
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A scientist studies the impact of a drug on cancer. The independent variables are the administration of the drug - the dosage
and the timing. The dependent variable is the impact the drug has on cancer.
Variables in an Experiment:
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VARIABLESDependent
variable
Independent variable
= What you change in the experiment
= what you measure in response to the change
Controlled variables =what you keep the same
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How do the different chemicals in fertilizers affect plant growth?
Independent Variable: different chemicals
Dependent Variables: plant growth
Control Group: soil, rainfall, when planted, etc.
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Stressed? How does stress affect heart rate
in humans?
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Scientific Methods
The scientific method is:A series of steps used by scientists to solve a problem or answer a question.
The Steps to the Scientific Method1. Observation / Asking a Question2. Form a Hypothesis3. Design a Controlled Experiment4. Record and Analyze Results5. Draw Conclusions
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Scientific Method vs. Engineering Design
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3 Types of Plate Boundaries
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Oceanic Vs. Continental
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The Rock Cycle
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Distance, Speed, Velocity
A train travels 240 miles in 2 hours. Calculate the average speed of the train in mph.
John leaves home at 6:00 a.m. and arrives at his brother’s house at 10:00 a.m. What is his average speed, in mph, if he had travelled 200 miles?
D
S T
Speed = Distance/Time Distance = Speed X Time
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Organ Systems