Aquatic algae are (mostly) microscopic plants that contain chlorophyll and grow by photosynthesis, and 
(Aquatic algae; are; mostly) microscopic plants that contain chlorophyll and grow by photosynthesis) (mostly) microscopic plants; contain; chlorophyll) (mostly) microscopic plants; grow; by photosynthesis)
Aquatic algae mostly) microscopic plants mostly) microscopic plants
are contain grow
mostly) microscopic plants that contain chlorophyll and grow by photosynthesis
chlorophyll
by photosynthesis