Biology Questions and Answers
Amphibians
- Which is the chordate class
considered an evidence of the
transition of the vertebrates
from the aquatic to the dry
land environment?
The amphibians arthe larval stage and partiallye totally aquatic in terrestrial (^)
animals as adults and for these facts
they are considin the evolutionary passagered intermediate bee of ings
vertebrates from the aquatic to the dry
land habitat. Amphibians are also thefirst tetrapod animals, i.e., the first with (^)
two pair of limbs, a typical feature of
terrestrial“amphibian” comes f vertebrates.rom th The namee double life (^)
(aquatic as larvae and partially
terrestrial as adults) of these animals.
- What are the amphibian
features that make them
dependent on water to
survive?
Permeable skin, body subject to
dehydration, without shells anexternal fecundation, egd larval stage with gs
branchial respiration are features that
make amphibians dto survive. ependent on water
- Do amphibians have direct
development?
In amphibians the embryonic
development is instage). direct (there is a larval- How different are the
respiration in fishes and the
respiration in adult
amphibians?
In fishes gcontact of water with tas exchange is done by directhe branchiae
(gills). Gases gain and exit the
circulation through the gills.
In adult amphibians gas exchange is
done through the moist anskin (cutaneous respirationd permeable) and also
through the lungs, a set of tiny airway
terminationsvascularized tissue sp associatedecialized i to a highlyn gas (^)
exchange.
The axolotlin Mexico that lives in water is an exotic amphibian foundand
“breathes”adult. through gills even as an
- How is respiration
performed by the larva of
amphibians?
The larva of amphibians has ebranchial respiration. This is one of thexclusively
reasons why survive. it depends on water to
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