Corals are made up of tiny animals known as polyps. Each of the polyps has a skeleton cup, tentacles with stinging cells, a mouth and a stomach. Algae grow in the stomach lining and supply calcium which the polyp uses to build the skeleton cup. Here's a neat model of a coral polyp your students can make.
Chewing lice are not as common as fleas and ticks, but just as itchy and annoying. Learn about the different types of lice out there and how to protect your pets. While lice may not be as common as fleas, they can still cause aggravation in some animals, especially animals who are very young, old, or sick. There are two types of lice that affect cats and dogs: sucking lice (which suck blood) and chewing lice. Chewing lice are tiny, flat, wingless insects that feed on the dead skin of pets.
It can be used on both Sucking and Biting Lice. It works at repelling the Lice over a six week period. Not suitable for to use on Pigs because there is not enough hair to hold the powder. Not suitable to use on Birds because the powder will not hold in feathers.lthough lice can only survive for a few days off their host it is important to remember to treat all bedding, housing etc at the same time to prevent re-infestation. Staying Power: Livestock Louse Powder can last for up to six weeks but reapplication may be necessary where wet weather conditions apply.