watch lecture 5 (http://www.3cmediasolutions.org/playlists/646?key=&i=10) and answer following 5 questions.1) Describe the natural history and unique physical characteristics of the thylacine. What it ate, where it lived and what did it look like? What were the reasons or factors that caused them to eventually go extinct?2) In your opinion, what could have been done to stop the extermination of the thylacine? Can you think of another predator today that is being exterminated as a result of man's fear and ignorance? hint: they are an American species just recently introduced to the Northern Rocky Mountains. Do a google search and write about this current issue. Who? Where? Why?3) Describe the passenger pigeon's natural history and the factors that caused it to go extinct. How does it's story compare with the thylacine?4) List and explain the four common characteristics that certain species have that may make them more vulnerable to extinction than other species as discussed in the lecture. Give examples of each.5) Write about your thoughts on the theory that we are headed for the 6th mass extinction. Explain what is meant by the 6th mass extinction. Why should we care?

What is the name of the only pigment that captures light directly in photosynthesis? (be specific) (2 points)Why does this pigment appear green? (2 points)List two variables besides the wavelength (color) of light which might affect the rate of food production in plants. (4 points)Why is chlorophyll important for all biological life? (5 points)In Part I of the procedure, what is the name of the indicator used to identify the presence of CO2? (2 points)What color did the indicator turn after blowing air into the water through the straw? (2 points)What color did the indicator turn after the tube was placed under a light source for 30 minutes? (2 points) Why did this occur? (3 points)List the functions of these four common pigments found in plants. (4 points)Chlorophyll aChlorophyll bXanthophyllCaroteneIf the Rf value of a pigment is .3750 and the distance that the solvent traveled is 11 cm, how far did the pigment travel? (5 points)Please list the Distance the solvent traveled, the Distance the pigment traveled, and the calculated Rf value for each of the pigments extracted from the spinach leaves, in the acetone chromatography procedure. (8 points)CaroteneXanthophyllChlorophyll aChlorophyll bBased on the Rf results, which pigment has the highest molecular weight? How can you tell? (5 points)From the chromatography lab, which pigments were soluble in the acetone? Explain your answer. (5 points)The earth's early atmosphere did not contain oxygen gas. This changed dramatically once the early cells underwent photosynthesis.Given that the early atmosphere did not contain oxygen gas, explain how photosynthesis was able to occur in this type of early atmosphere. (5 points)How did the photosynthesis process allow for the evolution of other, non-photosynthetic organisms? (5 points)In reviewing the data from the floating disk experiment, which factor had a greater impact on the rate of photosynthesis, increased light intensity or increased concentration of carbon dioxide? (1 point)Use your data to justify your response. (5 points)**INFORMATION NEEDED TO COMPLETE THE FOLLOWING PROBLEMS**Independent Variable: This is the cause.Dependent Variable: This is the response or effect.One hundred samples of several different plants were placed in each of six sealed containers with water in them. At the end of two days the amount of oxygen produced was measured. Results are shown in the table below.Container PlantHeight of PlantLight IntensitySource of LightDistance from LightmL O2 Produced1Iris4"HighArtificial6"162Iris4"HighNatural6"133Iris6"LowArtificial5"124Carnation6"HighNatural4"135Carnation6"LowNatural4"96Carnation4"LowArtificial5"14Multiple Choice: Based on the data presented in the table, which two containers could be correctly used to compare the rate of photosynthesis at two different light sources? Explain your answer. (5 points)1 and 22 and 31 and 55 and 64 and 5Multiple Choice: Compare Containers 4 and 5. What independent variable is tested by this comparison? Explain your answer. (5 points)Kind of plantHeight of plantLight intensityDistance from light sourceLight sourceMultiple Choice: Which container had the slowest rate of photosynthesis? Explain your answer. (5 points)123456(Application) How might the information gained from this lab pertaining to photosynthesis and pigments be useful to you, or how can you apply this knowledge to your everyday life as a non-scientist? The application will be graded according to the rubric below. (20 points

Use one of your three data tables to answer the questions. Inclination =  2°(9 points) 1.  Compare the slope of the distance vs. time graph to the average of all your velocity values. Are they close? Why or why not? What does the slope of a distance (or displacement) vs. time graph mean? Explain the answer using your data and include your Distance vs. Time graph and a chart of distance, time, and average velocity. Answer: The slope of the distance vs. time graph is 0.46 and the average of all of the averages is 0.50. Those two values are close. The slope of a time vs. distance formula indicates the average velocity of the ball. The slope formula (y2 – y1)/(x2 – x1) is pretty much same as calculating change in displacement (y2 – y1) over change of time (x2 – x1) and this gives the average velocity. Those two values are close because the trend line indicates how the data points will continue to be and since it is drawn properly it gives an idea of what the velocity the ball will continue to move in. Distance (m) Average time (s) Velocity (m/s) 0.5 0.89 0.56 1 2.01 0.5o 1.5 3.11 0.48 2 4.19 0.48  Average of the velocities :  0.50 m/s DISTANCE VS TIME GRAPH CHANGE LAYOUT(9 points) 2.  Describe the line on the velocity-time graph. What was the slope of the velocity vs. time graph? What does the slope of a velocity vs. time graph represent? Explain the answer using your data. In doing so, compare and contrast speed and velocity. Include your velocity-time graph in your answer. Answer: The line on the velocity-time graph was a curved one since the velocity was decreasing as time increased. The slope has a negative value of -0.03. This slope represents the average acceleration of the ball. The slope was negative because the ball was decelerating and coming down to a stop as it approached the  to 2m mark. Velocity and speed are different because speed is just a scalar quantity while velocity is a vector quantity that has magnitude and direction. TIME VS VELOCITY GRAPH CHANGE LAYOUT (7 points) 3.  Was the ball moving with uniform motion or did you notice some deceleration or acceleration? From what you have observed, explain what it means for an object to move with uniform motion. How does uniform motion relate to velocity and acceleration? Answer: The ball wasn't moving with a uniform motion. The calculated average velocity as well the the velocity time graph indicated that the ball was decelerating. For an object to move in a uniform motion it has to have either a constant velocity or a constant acceleration. If the object has a constant velocity then it is moving at zero acceleration and this means moving with out slowing down or speeding up. The object can also be said to have uniform motion if it accelerating at a constant rate. This means the velocity of the object changes by a constant number through out the journey. If the object is to continue moving with a uniform motion then the acceleration must not increase or decrease outside that constant rate.