To adapt to more viscous environments, larger organisms have likely evolved morphological features to combat this constrained. For large fish or whales, which adaptation is likely the most successful adaptation that allows them to swim more efficiently through the aquatic environment? a. tail fins only b. dorsal fins only c. monocular vision d. osmoregulation e. streamlined body shape
The correct answer and explanation is:
The correct answer is e. streamlined body shape.
In aquatic environments, resistance from water increases with the size and speed of an organism. For large fish or whales, a streamlined body shape is one of the most efficient adaptations that reduce drag and allow them to swim smoothly through the water. Streamlining refers to the shape of the body that minimizes resistance as the organism moves forward. This adaptation is crucial for maintaining energy efficiency and allows for faster swimming with less effort.
A streamlined body typically features a long, tapered shape with smooth contours. This reduces the friction between the body and water molecules, which is especially important for large organisms that must overcome significant drag forces. In addition, the streamlined shape enables the animal to glide through water with less turbulence, reducing the energy expended in maintaining movement.
Other features like tail fins and dorsal fins are important for propulsion and stability, but they do not directly address the overall drag that an organism experiences. The tail fin (caudal fin) provides thrust, while the dorsal fin helps with balance. However, without a streamlined body shape, these features would be less effective in reducing water resistance.
Monocular vision is irrelevant to swimming efficiency, as it primarily pertains to an organism’s ability to perceive its environment, not to how efficiently it moves through water. Osmoregulation is essential for maintaining fluid balance in marine or freshwater environments but does not directly impact swimming efficiency.
In conclusion, the streamlined body shape is the most successful adaptation for large fish or whales to efficiently move through water by reducing drag and conserving energy.