Salamanders are amphibians with very interesting mating rituals. The males perform speciesspecific dances that attract females to mate
Male salamanders deposit spermatophores
(mucus packets filled with sperm) on leaves, twigs, or the ground and guide females over
them so females can take them up into their cloaca. Mating dances like this result in internal
fertilization in many salamander species. Which of the following statements best explains
why salamanders are not entirely terrestrial in spite of exhibiting internal fertilization in many
species?
A. Salamanders require water for gas
exchange
B. Salamanders simply lay their eggs near
the water in which they live.
C. Internal fertilization is the first necessary
step towards non-dependence of water for
reproduction.
D. Salamanders do not produce amniotic
eggs, therefore they require water for
reproduction because eggs need protection
from desiccation.
E. Internal fertilization only occurs in species
where reproduction does not require water.
Salamanders simply lay their eggs near the
water in which they live.
D
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