Read the lab scenario, then answer the follow-up questions.

Alexis’ question: Will blocking the leaves’ stomata with Vaseline kill those leaves?

Alexis’ procedures:

● On a pea plant, Alexis covers the underside of 3 leaves with Vaseline.

● On a sunflower, Alexis covers the underside of 3 leaves with Vaseline. All the other leaves of each plant are “normal” (no Vaseline).

● She gives both plants equal amounts of water and sunlight for 14 days.

Alexis’ observations:

● After 14 days, 2 of the pea plant’s Vaseline leaves had fallen off.

● After 14 days, all 3 of the sunflower’s Vaseline leaves had fallen off.

● She forgot to count how many of the “normal” leaves (no Vaseline) fell off of each plant.

Alexis’ conclusion:

● Vaseline on the underside of the leaves blocks the stomata and makes the leaves die and fall off

Analysis Questions – these need to be answered: (2pts each)

1. What is the independent variable?

2. What are 2 mistakes Alexis made in this lab?

3. What plant process stops if the stomata are not functioning?

Note: Answer ALL analysis questions.