Top-Rated Free Essay

Classification

Good Essays
Classification
Why the butterfly belongs to the invertebrates:
The first animals to evolve were invertebrates. Fossil evidence of invertebrates dates back to the late Precambrian, 600 million years ago. Invertebrates evolved from single-celled microorganisms. Since then, invertebrates have diversified into countless forms. An estimated 97 percent of all species are alive today are invertebrates.
Invertebrates are united more by what they lack (a backbone) than by shared characteristics. Invertebrates include animal groups such as sponges, cnidarians, flatworms, molluscs, arthropods, insects, segmented worms, and echinoderms as well as many other lesser-known groups of animals.
Scientists are still uncertain exactly how the first invertebrates evolved. Most experts agree that the first invertebrates evolved from single-celled, food-eating microorganisms. Scientists think that these microorganisms formed permanent symbiotic groups and in doing so, they were no longer single-celled, they had become multicellular. When this happened, animals had evolved.
Invertebrates do not have bones, a bony skeleton, or a backbone. Instead, they gain structural support for their bodies in different ways. For example, sea anemones have a hydrostatic skeleton that produces support via sheets of muscles and an internal cavity filled with fluid. Other invertebrates such as insects and crustaceans have a hard outer shell or exoskeleton.
An estimated 97% of all species are alive today are invertebrates. Of all invertebrates, the insects are by far the most numerous. There are so many species of insects that scientists have yet to discover them all, let alone name or count them. Estimates of the total number of insect fall in the range of 1 to 30 million. There are also some 10,000 species of sponges, 9,000 species of cnidarians, 100,000 species of mollusks, and 75,000 species of arachnids in addition to tens of thousands of species belonging to other lesser known groups.
Butterflies and moth belong to the order Lepidoptera. Lepidos is Greek for "scales" and ptera means "wing". These scaled wings are different from the wings of any other insects. Lepidoptera is a very large group; there are more types of butterflies and moths than there are of any other type of insects except beetles. It is estimated that there are about 120,000 different species of butterflies and moths (divided in over 135 families).

You May Also Find These Documents Helpful

  • Good Essays

    Classification

    • 959 Words
    • 4 Pages

    Classification-California April Fonseca Kaplan University The classification process seems to be just about the same in most states. I will be focusing on California’s classification process as this is where I would like to pursue my career. National vs. State The National Institute of Corrections reports the purpose for the classification process is to assess every jail inmate's custody and program needs this is perhaps THE most important management tools available to jail administrators…

    • 959 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    A classification

    • 4812 Words
    • 35 Pages

    1. Introduction A classification of mobile business models and its applications Worldwide wireless Internet users are expected to rise from the current 96 million (2001) to more than a billion in 2006 (ARC Group, 2001). In spite of the widespread use of mobile services, previous research on business model-based mobile business classification has hardly been found. Similar to the research on Internet business, mobile business model classification needs to be researched in order to…

    • 4812 Words
    • 35 Pages
    Powerful Essays
  • Satisfactory Essays

    Classification

    • 287 Words
    • 2 Pages

    Different types of Traveling Vacation can be a short or long amount of time; I could take off from work and school to go visit friends, family, and my native land or stay home and relax. I’ve experienced three types of vacations: traveling alone, traveling with people I do not know and traveling with family of more than three people The first type, traveling alone, is the most expensive and not a fun trip. Even though it might be expensive; I like traveling alone on vacation. I go somewhere…

    • 287 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Classification

    • 399 Words
    • 2 Pages

    Rap Now a days there are many different types of music. There’s hip-hop, r&b, metal, rock or religious music. My favorite is Hip-hop because of its culture and because according to Wikipedia “rap origins from it Hip-Hop.” Wikipedia also states that “Rap is a music genre consisting of a stylized rhythmic music that commonly accompanies rapping, a rhythmic and rhyming speech that is chanted. It had been developed as part of hip hop culture, a subculture defined by four key elements: MCing/rapping…

    • 399 Words
    • 2 Pages
    Satisfactory Essays
  • Best Essays

    Classification

    • 962 Words
    • 4 Pages

    2012-2013 Fall, Economics Undergraduate Exam Schedule I. YEAR Course Code-Name ECO 135 Introduction to Economics I (01) ECO 135 Introduction to Economics I (02) ECO 135 Introduction to Economics I (03) ECO 135 Introduction to Economics I (04) ECO 137 Mathematics for Economics I (01) ECO 137 Mathematics for Economists I (02) ECO 137 Mathematics for Economists I (03) ECO145 Sociology ECO 129 Introduction to Man. (01/02) ECO 131 Accounting I INR 121 Introduction Law (01/02) TKD 103(65/66) II. YEAR…

    • 962 Words
    • 4 Pages
    Best Essays
  • Good Essays

    classification

    • 480 Words
    • 2 Pages

    The United States is the host of many of the world’s most elite athletes and sports teams. People travel around the world and come from other countries to be part of these teams. Basketball, baseball, and football are amongst the United States most favored sports. It is easy to identify and classify sports teams by the various things, the equipment and team components, as well as the attire and logos they are represented by. The United States has some of the world’s most talented athletes and…

    • 480 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Classifications of paragraph A classification paragraph begins a main idea and discusses the subcategories of that topic, comparing and contrasting them with each other. Following are some examples of classification paragraphs. Here are a couple of short classification paragraphs, in order to get you started with learning about how they should be formed and what they are. Remember: Classification paragraphs start with a main idea, using the rest of the paragraph to explain a series of secondary ideas…

    • 2231 Words
    • 7 Pages
    Powerful Essays
  • Good Essays

    Classification Essay

    • 650 Words
    • 3 Pages

    Classification Analysis of William Golding‘s “Thinking as a Hobby” “Thinking as a Hobby,” by William Golding, is a prime example of division and classification. Many never ponder about what Golding describes as a “thinking as my hobby”(494). He spent an abundance of his lifetime developing classifications of the three kind of thinkers: grade-three thinking, grade-two thinking and grade-one thinking. The effective use of classification, shows how something so alike, is still very different…

    • 650 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Sec Classification

    • 637 Words
    • 3 Pages

    SEC Classification The SEC Classification the classification of Indian consumers on the basis of parameters. Traditionally the two parameters used to categorize consumers were: Occupation and Education of the chief wage earner (Head) of the households.The SEC classification,created in 1988, was ratified by Market Research Society of India (MRSI), is used by most media researchers and brand managers to understand the Indian consuming class.Originally developed by IMRB International as a way of understanding…

    • 637 Words
    • 3 Pages
    Satisfactory Essays
  • Better Essays

    Classification of Gangs

    • 854 Words
    • 4 Pages

    Classification of Gangs Introduction The problem of classifying gangs has interested both sociologists and law enforcement. For the purpose of law enforcement, a gang is generally defined as an organized group among the members of which there is well-designed communication. This paper evaluates classification schemes from current research for gangs. The objective is to discover the issues and problems in creating classifications for gangs including a definition which delineates what constitutes…

    • 854 Words
    • 4 Pages
    Better Essays