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If the scientist blocks the stomata of the plant leaves with petroleum jelly, the plant will not be able to effectively exchange gases. Stomata are essential for the process of photosynthesis, as they allow carbon dioxide to enter the plant and oxygen to exit. Additionally, stomata play a crucial role in transpiration, which helps with water regulation.
Given that the plant is continuously watered and located in a sunny spot, but with the stomata blocked, the most likely outcome is:
**A) the plant withers and dies.**
Without functioning stomata, the plant will struggle to photosynthesize properly and may also experience difficulties in regulating its water supply, leading to dehydration and eventual death.