Is phytoplankton a vertebrate or invertebrate?

Answer 1

Phytoplankton are neither vertebrates nor invertebrates, as they are not animals but rather microscopic photosynthetic organisms. They primarily consist of algae and are crucial components of aquatic ecosystems, serving as a primary food source for many marine and freshwater organisms. Phytoplankton play a vital role in producing oxygen and absorbing carbon dioxide in the Earth's atmosphere.