Amphibians and fish have permeable skin which can allow which of the following to happen?

Amphibians and fish have permeable skin which can allow which of the following to happen?

• A. Absorb more water than they need
• B. Absorb toxins
• C. Absorb more sunlight that another animals
• D. Absorb solid substances

Answer: (B)

Substances move between an animal and its environment through permeable skin, meaning diffusion and osmosis can carry chemicals directly into the body. Amphibians and fish rely on their skin being thin and vascular, so dissolved substances in the water—including toxins—can readily diffuse into their bloodstream, which is why absorbing toxins is a real risk for these species. The other statements aren’t consistent with how permeable skin works: water can cross, but not in a way that means they “absorb more water than they need” as a primary trait; sunlight isn’t absorbed through the skin in a way that would compare across animals for this context; and solids aren’t typically absorbed through skin.

Substances move between an animal and its environment through permeable skin, meaning diffusion and osmosis can carry chemicals directly into the body. Amphibians and fish rely on their skin being thin and vascular, so dissolved substances in the water—including toxins—can readily diffuse into their bloodstream, which is why absorbing toxins is a real risk for these species. The other statements aren’t consistent with how permeable skin works: water can cross, but not in a way that means they “absorb more water than they need” as a primary trait; sunlight isn’t absorbed through the skin in a way that would compare across animals for this context; and solids aren’t typically absorbed through skin.