They're multiple ways to categorize nearly everything in biology. The value of an individual categorization scheme depends on the perspective of the user. The Classification of organisms is a hard task causes many organisms to have their differences and similarities, whereby making it very complicated in classifying organisms.
Answer: The tubule is long and highly coiled to provide a large surface area for selective reabsorption. The coiling of the tubule reduces the speed of the flow of the filtrate to give more time for efficient reabsorption. The tubule is well supplied with blood capillaries to increase a steep diffusion gradient for selective re-absorption.
Explanation: Selective reabsorption occurs because during ultrafiltration, important components of the blood are filtered out and they need to be reabsorbed into the body.
The answer is atmospheric
This would be an example of overproduction. The frog lays thousands of eggs, which is more than it needs, or would need in perfect conditions.