I think its ADP to ATP then NAD+ to NADH
Collenchyma and Parenchyma because they are cellulose containing cells.
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Flower because the others are a organ which make the plant live but the flower is more of a decorative thing to make the plant stand out
Hypertrophy or hypertrophic. Hope that answered your question :)
Answer: The second answer because, the Earth's mantle is mainly a fluid, but sometimes a solid. It rises, but never sinks.
Hope his helped! <3