6. Why can the all antois be
considered an adaptation to
terrestrial life?

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 allantois is an to dry
land because embryos of oviparous
terrestrial , like reptiles and birds,
metabolic residuals cannot be
excreted to the aquatic
(as fish and amphibian
do). It was necessary for
the appearance of structure capable of
storing embryonic excretes until
hatching.