Group+5+per+2

Chris, Sal, Joe

33) a student hypothezied that lettuce seeds will not germinate( begin to grow) unless they were covered with soil. the student planted 10 lettuce seeds on top of the soil. The data collected are shown in the table below.

Planted Under Soil 9 Scattered on top of Soil 8 To improve the reliability of these results, the student should

Answer: 4) Repeat the experiment using a larger sample size Because if you have a larger sample size then you can have more reliable results because you get more data collected.

34) In texas researchers gave a cholesterol reducing drug to 2335 people and an inactive substitute(placebo) to 2081. most of the volunteers were men who had normal cholesterol levels and no history of heart disease. after 5 years 97 people getting the placebo had suffered heart attacks compared to only 57 people who had recieved the actual drug. The researches are recommending that to help prevent heart attacks, all people (even those without high cholesterol) take these cholesterol-reducing drugs. In addition to the information above, what is another piece of information that the researchers must have before support for the recommendation can be justified.

Answer: 1) Were the eating habits of the two groups similar? Because if one group ate fast food they would be at more risk at a heart attack.

35) The diagram below represents a specimen on a slide as seen with the low-power objective of a compound light microscope. Using one or more sentences, explain how the slide should be moved to observe the entire specimen.

Answer: The specimen should be moved to the left because it is viewed opposite on the microscope.

36) Mark an appropriate scale on each axis.

Answer: On the x axis you should have gone by 5's from 5 to 90 for temperature. On the y axis you go by 1's from 1 to 10 for amount of protein digested.

37) The dependent variable in this investigation is the

Answer: 4) amount of protein digested Because the amount of protein digested depends on the temperature.

38) Plot the data on the grid. Surround each point with a small circle and connect the points as shown on the diagram.

Answer: plot the points at (5, 0.5), (10,1.0), (20, 4.0), (37, 9.5), (85, 0.0) on each point draw a circle around it and connect them, DON'T CONNECT TO 0