Section 2: Opeu. Response 30. In an investigation, students performed the following steps and made some
observations:
1. The students poured fresh water into a beaker and added a few drops of a
chemical solution called bromthymol blue. The water in the beaker turned blue
2. One student blew through a straw into the water in
the beaker. The water in the beaker turned yellow
3. The students then placed some waterweed (a plant)
into the water
in the beaker and placed the beaker
under a bright light
4. After a short period of time, the students observed
the beaker. The water had turned blue again and
there were bubbles on the waterweed leaves.
The setup of this investigation is shown.
a. The water changed from blue to yellow when the student blew into it (step 2). Identify
the compound that caused the water to change from blue to yellow.
b. Explain why the water turned blue again when the beaker with the waterweed was
under the bright light (step 4). In your explanation, identify the process that caused
this change.
c. Explain why there were bubbles on the waterweed leaves (step 4).
that caused the changes in step 4. You may

What type of specimens where you able to see under each of the microscopes in the microscope activity

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Scenario 5 1) take 10 red and 10 black beans and place them, mixed, on the table. record the starting phenotype # and frequencies (% of your total population) of your starting population in the table provided (generation 0). 2) act as a predator. “capture” as many organisms as you can until you have reduced the population to three organisms. put them aside. at this point, the predators die. 3) the remaining organisms each produce 2 clonal offspring. multiply your organisms accordingly and allow them to mix on the table. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 1). 4) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 2). 5) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 3).