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.
That is the basis for the name of this Phylum. There are various taxonomic keys that can be used to identify freshwater rotifers, of which there are more than a thousand species. A good key for species commonly found in lake plankton is Stemberger, R.S. 1979.A Guide to Rotifers of the Laurentian Great Lakes.otifers (Phylum Rotifera). These are small zooplankton, typically 100 to 500 um (microns) in length, with two distinctive features. First, they have a ciliated region at the apical or head end called a corona.