Final answer:
The leaf of a green plant shows the greatest increase in chloroplasts by the end of spring.
Step-by-step explanation:
The part of a green plant that shows the greatest increase in chloroplasts by the end of spring is the leaf. Chloroplasts are responsible for photosynthesis, which occurs in the leaves of green plants. As the weather warms up in spring, plants increase their chloroplast content in order to capture more sunlight and produce more energy through photosynthesis.
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