Copy of 2.) Photosynthesis - Leaf Anatomy (5/28/2026)

Last updated about 2 hours ago

25 questions

Note from the author:

Instructions

Model 1

Model 2

Copy of 2.) Photosynthesis - Leaf Anatomy (5/28/2026)

Last updated about 2 hours ago

25 questions

Note from the author:

Instructions

Model 1

Read This:

What would the world be like without leaves—no grass for ball fields, no beautiful landscaping? It would also mean no oxygen for animals and no food for heterotrophs. Leaves are like living machines that recycle the carbon and oxygen in our environment. This process, driven by the sun’s energy, allows for a constant supply of oxygen and food for the inhabitants of Earth.

Three things entering the leaf in Model 1 are: _______, _______, and _______.   

The three substances leaving the leaf are: _______, _______, and _______.   

Which substance is both entering and leaving the leaf? _______ 

How is the substance identified in question 3 changed between its entry and exit?

Select the dot at the end of the red line that points to the central vein on the leaf diagram below.

Use Model 1 and the equation for photosynthesis to answer the following:
a.) Reactants of photosynthesis _______ and _______  
b.) Products of photosynthesis _______ and _______ 
c.) Reactant 1 comes from: _______ 
d.) Reactant 2 comes from: _______ 
e.) Product 1 exits the leaf through the: _______ 
f.) Product 2 exits and enters into the: _______ 

Model 2

Read This: 
Plant veins consist of two distinct types of tissues. The xylem is responsible for transporting water and minerals from the roots of the plant to other areas of the plant. On the other hand, phloem is responsible for carrying nutrients and sugars away from the leaf to where the plant is growing or to storage areas within the plant. The stoma, which are typically located on the bottom of the leaf, is used to allow gases involved in photosynthesis (carbon dioxide and oxygen) to enter and leave the leaf. The guard cells, which surround each stoma, are used to open and close the stoma.

Describe the position of the vein in Model 1.

Describe the position of the vein in Model 2.

What are the functions of the veins (refer to the reading - i.e. the xylem and phloem)?

Read This:

Plant veins consist of two distinct types of tissues. The xylem is responsible for transporting water and minerals from the roots of the plant to other areas of the plant. On the other hand, phloem is responsible for carrying nutrients and sugars away from the leaf to where the plant is growing or to storage areas within the plant. The stoma, which are typically located on the bottom of the leaf, is used to allow gases involved in photosynthesis (carbon dioxide and oxygen) to enter and leave the leaf. The guard cells, which surround each stoma, are used to open and close the stoma.

Using model 2, determine which type of cells have chloroplasts in them. _______ 

In which part of the leaf is photosynthesis taking place? _______ 

The green color of chloroplasts is due to a pigment in them that absorbs light energy. Knowing this, infer which layer inside a leaf gives the whole leaf its green color._______ 

Explain your answer to question 14.

Through which two layer(s) does light energy travel to reach the palisade mesophyll? _______ and _______ 

Stop here. 
Make sure 1-17 of this is complete (look at the class recording from Thursday).
Make sure your notes are complete - Photosyn. Notes - https://frm.tv/formatives/695c6ccefd1f730f435e3fdd

Suppose there were many chloroplasts in the cells of the upper epidermis. How would that change the amount of sunlight reaching the chloroplasts in the palisade layer?

What do you think might be the function of the epidermis?

Read This:
The cuticle covering the upper and lower epidermis of land plants is made of a waxy substance that repels water much the same way as wax on a paper cup. This waxy layer helps to prevent water from entering through the leaf or the exit through the leaf. Consider what might happen if a leaf was to lose too much water.

What would be the importance of the waxy cuticle layer of the leaf?

Refer to model 2.
   a.) What structure is found between the guard cells? _______ 
   b.) How would you describe its structure? _______ 
   c.) How would this affect the ability of the leaf to retain water, especially in dry conditions? _______ 

Copy of 2.) Photosynthesis - Leaf Anatomy (5/28/2026)

Copy of 2.) Photosynthesis - Leaf Anatomy (5/28/2026)

How is the substance identified in question 3 changed between its entry and exit?

Select the dot at the end of the red line that points to the central vein on the leaf diagram below.

Describe the position of the vein in Model 1.

Describe the position of the vein in Model 2.

Explain your answer to question 14.

Stop here.

Suppose there were many chloroplasts in the cells of the upper epidermis. How would that change the amount of sunlight reaching the chloroplasts in the palisade layer?

What do you think might be the function of the epidermis?

What would be the importance of the waxy cuticle layer of the leaf?

Suggest a way in which the stoma and guard cells arrangement might work to control the amount of water that is leaving the leaf.

Refer to model 1. What gases might you find inside the air spaces that are shown in model 2?

When stomata (the plural of stoma) are closed, gases cannot enter or leave. Explain how this would affect the plant’s ability to do photosynthesis.

In grammatically correct sentences, trace the path of the reactants for photosynthesis as they enter the leaf.

How is the substance identified in question 3 changed between its entry and exit?

Select the dot at the end of the red line that points to the central vein on the leaf diagram below.

Categorize all of the components of photosynthesis as either matter or energy.

Sequence all of the layers of the leaf starting at the upper cuticle and finishing at the lower cuticle. Examine model 2 - place these structures in a top-to-bottom order.

Describe the position of the vein in Model 1.

Describe the position of the vein in Model 2.

Explain your answer to question 14.

Using model 2, place each description as either belonging to palisade mesophyll cells or to the other cells in the leaf.

Stop here.

Suppose there were many chloroplasts in the cells of the upper epidermis. How would that change the amount of sunlight reaching the chloroplasts in the palisade layer?

What do you think might be the function of the epidermis?

What would be the importance of the waxy cuticle layer of the leaf?

Suggest a way in which the stoma and guard cells arrangement might work to control the amount of water that is leaving the leaf.

Refer to model 1. What gases might you find inside the air spaces that are shown in model 2?

When stomata (the plural of stoma) are closed, gases cannot enter or leave. Explain how this would affect the plant’s ability to do photosynthesis.

In grammatically correct sentences, trace the path of the reactants for photosynthesis as they enter the leaf.