Unit 3 Performance Task: Cellular Systems (Elodea Experiment)

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Unit 3 Performance Task: Cellular Systems (Elodea Experiment)

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PART 3: Analyzing Data

Leaf chlorosis causes the yellowing of leaf tissue due the leaf being unable to absorb sunlight as seen in the image below. Over time, the leaf will turn yellow and die. Next, the branch and the entire plant will die due to lack of energy.

null The line graph below compares the amount of oxygen produced (in mL) by a healthy plant vs. a diseased plant.

null

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CLAIM: Based on the graph, which statement is correct?

Healthy plants are able to perform photosynthesis at a faster rate.

Plants diseased with Chlorosis are able to perform photosynthesis at a faster rate.

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PART 1: Elodea Experiment

A biology class conducted an experiment to investigate how light intensity influences energy production in Elodea plants. Elodea is an aquatic plant commonly used in freshwater aquariums. The class used three different experimental setups, each containing a similarly sized Elodea plant in a beaker of water. The Elodea plants were placed under a funnel leading to a test tube, which was used to measure the amount of gas released.

null Students counted the number of gas bubbles that were released by the plants over a set period to determine the average number of gas bubbles produced per minute for each setup. Their findings are shown in the table below:

null

For Setups A and B, select which of the following correctly identifies the type of gas being released by the plant and why.

oxygen gas because in the light, the plants are doing mostly photosynthesis

oxygen gas because in the light, the plants are doing mostly cell respiration

carbon dioxide gas because in the light, the plants are doing mostly photosynthesis

carbon dioxide gas because in the light, the plant is doing mostly cell respiration

Which of the following statements best describes the difference in gas production between Setup A and Setup B?

Setup A is closer to the light so it should perform more photosynthesis.

Setup B is closer to the light so it should perform more photosynthesis.

Setup A is further from the light so it should perform more photosynthesis.

Setup B is further from the light so it should perform more photosynthesis.

For Setup C, select which of the following correctly identifies the type of gas being released AND explains how the plant produces gas in the absence of light.

Oxygen gas because in the light, plants mostly perform photosynthesis.

Carbon dioxide gas because in the light, plants mostly perform photosynthesis.

Oxygen gas because in the dark, plants mostly perform cell respiration.

Carbon dioxide gas because in the dark, plants mostly perform cell respiration.

PART 3: Analyzing Data

Leaf chlorosis causes the yellowing of leaf tissue due the leaf being unable to absorb sunlight as seen in the image below. Over time, the leaf will turn yellow and die. Next, the branch and the entire plant will die due to lack of energy.

null The line graph below compares the amount of oxygen produced (in mL) by a healthy plant vs. a diseased plant.

null

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1

CLAIM: Based on the graph, which statement is correct?

Healthy plants are able to perform photosynthesis at a faster rate.

Plants diseased with Chlorosis are able to perform photosynthesis at a faster rate.

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EVIDENCE: Support your chosen claim from question 3a by using 2 pieces of numerical evidence from the line graph.

Complete the statements below using the dropdown boxes.

Evidence #1: "At 10 minutes, the healthy plant produced mL of oxygen."

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Compare the rate of oxygen production between the healthy plant and the plant diseased with chlorosis. Which plant makes more oxygen?

Healthy plant

Diseased plant

They are equally as successful at oxygen production.

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REASONING: Explain why the rate of photosynthesis is different in BOTH the healthy plant AND the diseased plant. Use the graph and the words oxygen production, sunlight, and photosynthesis in your answer.
Here are some sentence starters ...
"The healthy plants have a (high/low) rate of photosynthesis because ..."
"The diseased plants have a (high/low) rate of photosynthesis because ..."

PART 2: Exploring Maple Tree Cell Growth & Development

The leaves of these maple trees have developed strange looking growths. They appear to be cancerous. Below are samples of a healthy maple leaf vs. a cancerous maple leaf.

null Below is a digram of the cell cycle.

null The graph below shows how cancer might impact your maple trees. It shows how much glucose (sugar) is produced by healthy maple leaves and by cancerous maple leaves.

null Use the information above to answer the following questions.

What process of the cell cycle was disrupted that caused the abnormal cells to be produced?

Cellular Respiration

Meiosis

Cell Cycle

Photosynthesis

What are TWO reasons this process (from 2a) is necessary? Select ALL that apply!

Growth

Creation of gametes

Repair

Genetic variation

You discovered that these cells were caused by errors in the DNA replication in the new leaf cells. Name a checkpoint in the Cell Cycle where this error should have been caught.

G1

S

G2

M

CLAIM: Formulate a claim by completing the statement below using the dropdown box.

"The mg of glucose on day 4."

EVIDENCE: Include numerical data from the graph that support your claim by completing the statement below using the drop down box.

"The cancerous leaf produced

Healthy plants produce more glucose because they are able to absorb more sunlight and perform photosynthesis more effectively.

Healthy plants produce less glucose because they are able to absorb more sunlight and perform photosynthesis more effectively.

Cancerous plants produce more glucose because they are able to absorb more sunlight and perform photosynthesis more effectively.

Cancerous plants produce less glucose because they are able to absorb more sunlight and perform photosynthesis more effectively.

EVIDENCE: Support your chosen claim from question 3a by using 2 pieces of numerical evidence from the line graph.

Complete the statements below using the dropdown boxes.

Evidence #1: "At 10 minutes, the healthy plant produced mL of oxygen."

Compare the rate of oxygen production between the healthy plant and the plant diseased with chlorosis. Which plant makes more oxygen?

Healthy plant

Diseased plant

They are equally as successful at oxygen production.

REASONING: Explain why the rate of photosynthesis is different in BOTH the healthy plant AND the diseased plant. Use the graph and the words oxygen production, sunlight, and photosynthesis in your answer.
Here are some sentence starters ...
"The healthy plants have a (high/low) rate of photosynthesis because ..."
"The diseased plants have a (high/low) rate of photosynthesis because ..."