Environmental Science DSST Test Questions and Complete Solutions

Protists a diverse group of one celled organisms and their many-celled relatives Plants Many-celled organisms that have cell walls and that make their own food using the sun's energy Gymnosperms woody plants that produce seeds, but their seeds are not enclosed in fruits Angiosperms flowering plants that produce seeds in fruit Invertebrates animals that lack backbones vertebrates animals with backbones The 8 kingdoms of organisms Archaebactera Eubacteria Fungus Protist Gymnosperm Angiosperm Invertebrate Vertebrate Benefits of Bacteria and Fungi Bacteria breaks down the remains and wastes other organisms and returns nutrients to the soil. Bacteria recyles mineral nutrients Bacteria contains nutrients for food. Fungi adds flavor to food Fungi (yeast) adds gas to food to make it rise Fungi breaks down matter and absorbs nutrients Fungi breaks down body parts and the bodies of dead organisms Benefits of Protists to the Ocean Algae is the intial sources of food in most ocean and freshwater ecosystems. Why Insects are so successful Insects have a waterproof external skeleton. They move quickly and reproduce quickly. They can fly and are small enough to hide.