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.
Plankton occupy the pelagic zone of the water column, which is named after its pelagic inhabitants. Plankton may range in size from less than 2 micrometers to organisms larger than 200 micrometers. The category includes many different species of organisms in ocean and freshwater ecosystems. Plankton are divided into phytoplankton and zooplankton. Phytoplankton are photosynthetic and act as the primary producers in an aquatic environment. Zooplankton are heterotrophic and consume smaller plankton. Phytoplankton