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.
Plankton are also divided into 3 main types: 1  Phytoplankton (from Greek phyton or plant), algae that live near the water surface where there is sufficient light to support photosynthesis. 2  Zooplankton (from Greek zoon or animal), small protozoa, crustaceans, jellyfish and various other animals that feed on other plankton.n Plankton, Sea Life. plankton facts-facts about plankton-what is plankton-. Plankton is not the name of a plant or animal but more of a category for any drifting organism that inhabits the middle to upper levels of the ocean, namely the pelagic zone.
Most plankton is microscopic, especially that found in freshwater. Marine plankton have exclusively whole groups of organisms that are very visible to the naked eye, e.g. Ctenophores (sea gooseberries). All plankton is divided into the plant-type plankton, the phytoplankton, and the animal plankton, zooplankton.The latter can be further sub-divided into the temporary and permanent zooplankton. The temporary tends to be those which are larval forms of adults living on the seashore, e.g. barnacle larvae called nauplii.tenophores (sea gooseberries). All plankton is divided into the plant-type plankton, the phytoplankton, and the animal plankton, zooplankton. The latter can be further sub-divided into the temporary and permanent zooplankton.