Durable good. A car is a durable good. The gasoline that powers it is a non-durable good, or consumable good. In economics, a durable good or a hard good is a good that does not quickly wear out, or more specifically, one that yields utility over time rather than being completely consumed in one use. Items like bricks could be considered perfectly durable goods because they should theoretically never wear out.
Photosynthetic Protists. These protists belong to a division called Pyrrophyta of algae. They are a well defined group of unicellular, photosynthetic forms. Most of them are flagellated and motile but some forms are non-flagellated.
Most are unicellular, some are colonial, and other are simple multicellular organisms closely related to single protist cells. One group of protists, the algae, are autotrophic photosynthesizers, while the rest eat bacterial or other protistan cells, or small organic particles suspended or dissolved in water.