Which species lays eggs directly in water in a large egg sac?

Which species lays eggs directly in water in a large egg sac?

• A. Midwife toad
• B. Mexican burrowing toad
• C. Great crested newt
• D. Chinese giant salamander

Answer: (A)

The key idea is how amphibians lay and organize their eggs in water. Some species release many eggs into the water as a single, gelatinous mass that forms a noticeable clump or “sac,” while others lay eggs singly or in small clusters, or on land. The midwife toad is distinctive because its reproductive process creates a large, cohesive gelatinous mass in the water that contains many eggs, rather than tiny, scattered eggs or a string of eggs laid on vegetation or land. This pattern matches the description of laying eggs directly in water in a large egg sac, making it the best fit among the options. The other species tend to lay eggs differently: single eggs on submerged plants, small clumps near water but not a single large mass, or eggs laid on land rather than directly into a large water-filled sac.

The key idea is how amphibians lay and organize their eggs in water. Some species release many eggs into the water as a single, gelatinous mass that forms a noticeable clump or “sac,” while others lay eggs singly or in small clusters, or on land. The midwife toad is distinctive because its reproductive process creates a large, cohesive gelatinous mass in the water that contains many eggs, rather than tiny, scattered eggs or a string of eggs laid on vegetation or land. This pattern matches the description of laying eggs directly in water in a large egg sac, making it the best fit among the options. The other species tend to lay eggs differently: single eggs on submerged plants, small clumps near water but not a single large mass, or eggs laid on land rather than directly into a large water-filled sac.