Characteristics. 1  Closed pockets of tissue that can be filled with fluid or pus. 2  Can appear anywhere on the skin. 3  Smooth to the touch; feels like a pea underneath the surface. 4  Slow growing and generally is painless and benign. 5  Only needs attention if it becomes infected or inflamed.
It has long been recognized and documented that insects are the most diverse group of organisms, meaning that the numbers of species of insects are more than any other group. In the world, some 900 thousand different kinds of living insects are known. This representation approximates 80 percent of the world's species. The true figure of living species of insects can only be estimated from present and past studies.
It is estimated that there are another 3 million to 30 million more to identify. Animals are classified into two major groups; vertebrates and invertebrates. Invertebrates are classified as animals without a backbone and make up about 97% of all animal species.Simple invertebrates include sponges, cnidarians, flatworms, and roundworms.t is estimated that there are another 3 million to 30 million more to identify. Animals are classified into two major groups; vertebrates and invertebrates. Invertebrates are classified as animals without a backbone and make up about 97% of all animal species.