These are the neoteny, and are particularly common where terrestrial conditions are bad.

These plants are undoubtedly growing in the harshest terrestrial conditions on our planet and can metabolise only for about 300 hours a year.

This culminated with a transition to terrestrial conditions in the Přídolí.

Without this flexibility we could never have survived the change from solar to terrestrial conditions.

Under terrestrial conditions, conversion of one element to another is very rare.

Most of the plants in this group are epiphytes, though some have evolved in, or will adapt to, terrestrial conditions.

Probably they were a group of scientists who desired to gather data regarding terrestrial conditions, and were willing to chance the bodily peril.

What differences from terrestrial conditions will ensue?

Pennsylvanian New Mexico experienced both marine and terrestrial conditions over time.

"This object might well adapt itself to terrestrial conditions?"