Question

Which of the statements is true of saltwater and freshwater animal waste management systems?
Question 12 options:

A)

No saltwater or freshwater animals urinate.

B)

Freshwater-based animals must have mechanisms to prevent water from trying to diffuse into their bodies.

C)

Both saltwater and freshwater animals don't need to eliminate waste, as it diffuses out of their bodies naturally

D)

Saltwater-based animals must have a mechanism to prevent water from trying to diffuse into their bodies

Answer 1

The correct statement regarding saltwater and freshwater animal waste management systems is:

**B) Freshwater-based animals must have mechanisms to prevent water from trying to diffuse into their bodies.**

Freshwater animals tend to gain water through osmosis because their body fluids are more concentrated than the surrounding water. Therefore, they have adaptations to expel excess water and conserve salts, which is why they need mechanisms to prevent water from diffusing into their bodies.