Spines, Flowers, and a Waxy Stem Coating Are All Adaptations

question 30

Multiple Choice

Spines, flowers, and a waxy stem coating are all adaptations of cacti because

• A) these traits increase the fitness of cacti and arose as a result of natural selection for their current function.
• B) these traits arose prior to the diversification of cacti and perform different functions in different cactus species.
• C) they develop when the climate is dry, making the cacti a better fit to the environment.
• D) they arose by chance and do not provide any benefit to the individuals that have these traits.

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