AP Bio Quiz - Unit 0 - Experimental Design - Heather Kalenak | Biblioteka

Obavezno

1

In a controlled experiment, researchers investigated the relationship between light intensity and the rate of photosynthesis in Spinacia oleracea (spinach) leaf discs. The discs were submerged in a bicarbonate solution and exposed to varying light intensities. The rate of photosynthesis was estimated by measuring the number of leaf discs that floated to the surface over 10 minutes, a proxy for oxygen production.
Which of the following best identifies the scientific question being tested in a study?

Does increasing carbon dioxide concentration increase photosynthetic efficiency in spinach leaves?

How does light intensity affect the buoyancy of spinach leaf discs in a bicarbonate solution?

What is the effect of light intensity on the rate of photosynthesis in spinach leaves as measured by oxygen production?

At what light intensity do spinach leaves reach their photosynthetic saturation point?

3.A

Obavezno

1

Which of the following hypotheses would be considered the null hypothesis?

There is no significant difference between the observed and an expected values for the dependent variable.

There is a significant different between the observed and expected values for the dependent variable.

Obavezno

1

Identify the independent variable in the scenario below

Obavezno

1

Identify the dependent variable in the scenario below

Obavezno

1

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day.
How could this experiment be improved using a control?

Half of the participants should receive a placebo.

Make sure that all 500 participants are of the same biological sex and age.

Change the self report to an MRI scan to measure the diameter of cerebral blood vessels.

Allow the participants to chose how much of the pain reliever they take because some may have more severe headaches than others.

3.C.ii

Obavezno

2

Using no more than 1-2 sentences, justify your answer choice from question 5.

3.C.iii

Obavezno

0

Using the scenario in question 5 again assume the results showed that the pain reliever was very effective. Propose a possible scientific question for a follow-up study and justify.

3.D

2

Both qualitative and quantitative data can be gathered in an experiment. Indicate which data type the following belong to by dragging them to the correct category.

weight loss of 2 kg
slimy texture
30°C
greenish hue

Quantitative
Qualitative

1

Increasing the sample size of a study could result in all of the following effects EXCEPT:

A increase in the ability to generalize the findings.

An increase in the financial cost of the study.

An increase the margin of error.

An increase in reliability.

AP Bio Quiz - Unit 0 - Experimental Design

AP Bio Quiz - Unit 0 - Experimental Design

Which of the following hypotheses would be considered the null hypothesis?

Identify the independent variable in the scenario below

Identify the dependent variable in the scenario below

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day. How could this experiment be improved using a control?

Using no more than 1-2 sentences, justify your answer choice from question 5.

Using the scenario in question 5 again assume the results showed that the pain reliever was very effective. Propose a possible scientific question for a follow-up study and justify.

Both qualitative and quantitative data can be gathered in an experiment. Indicate which data type the following belong to by dragging them to the correct category.

Increasing the sample size of a study could result in all of the following effects EXCEPT:

Which of the following hypotheses would be considered the null hypothesis?

Identify the independent variable in the scenario below

Identify the dependent variable in the scenario below

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day. How could this experiment be improved using a control?

Using no more than 1-2 sentences, justify your answer choice from question 5.

Using the scenario in question 5 again assume the results showed that the pain reliever was very effective. Propose a possible scientific question for a follow-up study and justify.

Both qualitative and quantitative data can be gathered in an experiment. Indicate which data type the following belong to by dragging them to the correct category.

Increasing the sample size of a study could result in all of the following effects EXCEPT:

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day.
How could this experiment be improved using a control?

Researchers set up a study over the efficacy of a pain reliever pill for headaches. They have 500 participants in the study and each participant received 1 dose every 6 hours and self-reported their level of pain for a day.
How could this experiment be improved using a control?