Essential oils are natural, chemical-free alternatives to store-bought bug sprays. Many essential oils are mosquito repellents. Lemongrass and Citronella are the most commonly used in natural bug sprays, but most lemon-scented essential oils are insecticides. Other good options include Eucalyptus and Lavender.
1 Phytoplankton: photosynthetic plankton that are usually microscopic and are also called âalgae... 2  more. 3  Zooplankton: small, sometimes microscopic animals that live in water and feed on phytoplankton (algae), other zooplankton, or detritus (dead material)...4  more.here are bacteria that decompose, or break down, dead organisms and animal waste in the water. There are also photosynthetic bacteria that use the sunâs energy to turn carbon dioxide into sugars. These are called cyanobacteria, and theyâre a type of phytoplankton. Other kinds of phytoplankton, though, are eukaryotes.
Marine Biology. Plankton. General Info: Plankton comes from the Greek word âplanktosâ which means drifter. Movement Most organisms move with the current. Some have the ability to move on their own. For example, copepods are the fastest animal for their size-they move more than 500 body lengths per second.