1. Which is the chordate class
considered an evidence of the
transition of the vertebrates
from the aquatic to the dry
land environment?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The amphibians are aquatic in
the stage and partially
animals as adults for these facts
are considered intermediate
in the evolutionary of
vertebrates from aquatic to the
land habitat. Amphibians also the
first animals, i.e., the with
two pair limbs, a typical of
terrestrial vertebrates. name
“amphibian” comes the double life
( as larvae and
terrestrial as adults) these animals.