Massachusetts Comprehensive Assessment System (MCAS) Biology Practice Test

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Prepare for the Massachusetts Comprehensive Assessment System (MCAS) Biology Test. Ace your exam with flashcards and multiple-choice questions, all with helpful hints and explanations. Start studying today!

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What is the role of the remora fish in its relationship with whales?

To provide cleaning services
To help guide during swimming
To obtain food scraps
To compete for space

The correct answer is: To obtain food scraps

The role of the remora fish in its relationship with whales primarily involves obtaining food scraps. Remoras have specialized suction pads on the top of their heads that allow them to attach to the bodies of larger marine animals, including whales. By hitching a ride on these massive creatures, remoras can access food sources that might otherwise be out of reach. As the whale swims and feeds, it dislodges bits of food, which the remora can then consume. This relationship showcases a form of commensalism, where one species benefits (the remora) while the other (the whale) is not significantly affected positively or negatively. In contrast, providing cleaning services typically points to a mutualistic relationship, which is not the primary interaction between remoras and whales. Helping guide during swimming would imply an active role in navigation, which remoras do not fulfill in this context. Competing for space would suggest a negative interaction, contradicting the nature of their attachment and feeding strategy. Therefore, the primary aspect of the remora's relationship with whales is its ability to efficiently gather food scraps while traveling alongside the host.