Question

place the items in the appropriate adaptation of photosynthesis. some labels can be used more than once.

labels
makes crassulacean acid
sensitive to photorespiration
initially fix co₂ with pep carboxylase
initially fix co₂ with rubisco
have bundle sheath cells
found in desert plants

drop zones
reset all
c3 plants (1/3)
c4 plants (2/3)

Explanation:

To solve this problem, we analyze the adaptations of C3 and C4 plants (and CAM plants, as "makes crassulacean acid" relates to CAM):

C3 Plants:

• Sensitive to photorespiration: C3 plants use rubisco for initial CO₂ fixation, and rubisco can bind O₂ (causing photorespiration) when CO₂ levels are low.
• Initially fix CO₂ with rubisco: C3 plants directly fix CO₂ into 3 - carbon compounds using rubisco in the Calvin cycle.

C4 Plants:

• Initially fix CO₂ with PEP carboxylase: C4 plants first fix CO₂ into a 4 - carbon compound using PEP carboxylase in mesophyll cells.
• Have bundle sheath cells: C4 plants have specialized bundle sheath cells where the Calvin cycle occurs (separating CO₂ fixation and the Calvin cycle spatially).

CAM Plants (note: "makes crassulacean acid" and "found in desert plants" apply here, but if we consider the drop zones for C3/C4, likely a mix with CAM - related labels for desert adaptation):

• Makes crassulacean acid: CAM plants (e.g., desert succulents) fix CO₂ at night into crassulacean acid.
• Found in desert plants: CAM plants are adapted to arid environments (deserts) by opening stomata at night to conserve water.

Correct Placement (assuming the drop zones include CAM - related or a mix, but focusing on C3/C4 + CAM):

• C3 plants:
• Sensitive to photorespiration
• Initially fix CO₂ with rubisco
• C4 plants:
• Initially fix CO₂ with PEP carboxylase
• Have bundle sheath cells
• CAM - related (if a drop zone for desert/CAM):
• Makes crassulacean acid
• Found in desert plants

(Note: The original problem’s drop zones might include CAM - related adaptations too, as "makes crassulacean acid" is a CAM plant trait. Adjust based on the exact drop zone labels, but the key is matching each label to the correct plant type’s adaptation.)

Final Answer (for typical placement):

• C3 plants: Sensitive to photorespiration, Initially fix CO₂ with rubisco
• C4 plants: Initially fix CO₂ with PEP carboxylase, Have bundle sheath cells
• CAM - related (if applicable): Makes crassulacean acid, Found in desert plants

(If the drop zones are only C3 and C4, "makes crassulacean acid" and "found in desert plants" belong to CAM plants, which are a separate photosynthetic adaptation, but sometimes grouped in such activities. Adjust based on the problem’s intended scope.)

Answer:

To solve this problem, we analyze the adaptations of C3 and C4 plants (and CAM plants, as "makes crassulacean acid" relates to CAM):

C3 Plants:

• Sensitive to photorespiration: C3 plants use rubisco for initial CO₂ fixation, and rubisco can bind O₂ (causing photorespiration) when CO₂ levels are low.
• Initially fix CO₂ with rubisco: C3 plants directly fix CO₂ into 3 - carbon compounds using rubisco in the Calvin cycle.

C4 Plants:

• Initially fix CO₂ with PEP carboxylase: C4 plants first fix CO₂ into a 4 - carbon compound using PEP carboxylase in mesophyll cells.
• Have bundle sheath cells: C4 plants have specialized bundle sheath cells where the Calvin cycle occurs (separating CO₂ fixation and the Calvin cycle spatially).

CAM Plants (note: "makes crassulacean acid" and "found in desert plants" apply here, but if we consider the drop zones for C3/C4, likely a mix with CAM - related labels for desert adaptation):

• Makes crassulacean acid: CAM plants (e.g., desert succulents) fix CO₂ at night into crassulacean acid.
• Found in desert plants: CAM plants are adapted to arid environments (deserts) by opening stomata at night to conserve water.

Correct Placement (assuming the drop zones include CAM - related or a mix, but focusing on C3/C4 + CAM):

• C3 plants:
• Sensitive to photorespiration
• Initially fix CO₂ with rubisco
• C4 plants:
• Initially fix CO₂ with PEP carboxylase
• Have bundle sheath cells
• CAM - related (if a drop zone for desert/CAM):
• Makes crassulacean acid
• Found in desert plants

(Note: The original problem’s drop zones might include CAM - related adaptations too, as "makes crassulacean acid" is a CAM plant trait. Adjust based on the exact drop zone labels, but the key is matching each label to the correct plant type’s adaptation.)

Final Answer (for typical placement):

• C3 plants: Sensitive to photorespiration, Initially fix CO₂ with rubisco
• C4 plants: Initially fix CO₂ with PEP carboxylase, Have bundle sheath cells
• CAM - related (if applicable): Makes crassulacean acid, Found in desert plants

(If the drop zones are only C3 and C4, "makes crassulacean acid" and "found in desert plants" belong to CAM plants, which are a separate photosynthetic adaptation, but sometimes grouped in such activities. Adjust based on the problem’s intended scope.)