4. What is the evolutionary
importance of pteridophytes?

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!
As the first tracheophytes,
were also the first
to extensively colonize the
environment forming forests. They
constituted an important source food
for terrestrial animals. presenting
conductive vessels they be larger,
a feature from them by
phanerogamic .