Biology - Organisms and Populations Question with Solution | TestHub
BiologyOrganisms and PopulationsAdaptationsMedium2 minPYQ_2026
BiologyMediumsingle choice
Select the INCORRECT statement aboutOpuntia:
Options:
Answer:
B
Solution:
In Opuntia, the stem is modified into a flattened, green, fleshy structure called a phylloclade which performs the function of photosynthesis.
The leaves are modified into spines to reduce water loss by transpiration and for defense. Spines do not perform photosynthesis.
Opuntia is a xerophytic plant that follows the CAM (Crassulacean Acid Metabolism) pathway to conserve water.
In CAM plants, stomata remain closed during the day to prevent water loss and open during the night (scotoactive stomata) to take in carbon dioxide.
Answer: Leaf spines perform the function of photosynthesis
Stream:MHT_CET_MEDICALSubject:BiologyTopic:Organisms and PopulationsSubtopic:Adaptations
⏱ 2mℹ️ Source: PYQ_2026
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