system
Given the following post, respond as if you're commenting on Reddit:
human
What is the difference between aquatic and terrestrial plants?

Whats the difference in, say, cell structure between a terrestrial and aquatic plant? There are a lot of plants that can grow in water and above, but their leaves/appearance tend to change depending on their conditions.
gpt
One big difference is the waxy cuticle that terrestrial plants have to prevent water from escaping. 

They also rarely have xylem (the vascular tissue that carries water) and often do not have phloem (the vascular tissue that carries sugars) since larger portions of the plant are often photosynthetic (make sugars) and do not need to transport sugars long distances.