Entomology Terminologies Quiz
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Questions and Answers

What is the anatomical feature of certain insect orders such as beetles and some true bugs that is referred to as the elytron?

  • Elbowed antenna
  • Modified compound eye
  • Area below the compound eyes
  • Hardened forewing (correct)
  • Which term in entomology refers to the feeding on other insects?

  • Gena
  • Entomophagy (correct)
  • Hemocoel
  • Frons
  • In insects, what is contained in the hemocoel?

  • Modified forewing
  • Hemolymph or haemocyte (correct)
  • Anatomical feature below the compound eyes
  • Fluid in the compound eye
  • Which leg segment of an insect is located between the trochanter and tibia?

    <p>Femur</p> Signup and view all the answers

    What is the area on an insect's head that is equivalent to human cheeks called?

    <p>Gena</p> Signup and view all the answers

    What are the tagmata or body regions in Arachnids?

    <p>Prosoma and opisthosoma</p> Signup and view all the answers

    Which term in entomology refers to the pair of wings of a four-winged insect closest to the head?

    <p>Forewing</p> Signup and view all the answers

    Which classification of organisms has little evidence of external segmentation?

    <p>Arachnida</p> Signup and view all the answers

    What is a spinneret in arthropods primarily used for?

    <p>Silk spinning</p> Signup and view all the answers

    Which classification of organisms has gonopores located on the base of posterior thoracic appendages?

    <p>Crustacea</p> Signup and view all the answers

    How many pairs of antennae do members of Arachnida have?

    <p>One pair</p> Signup and view all the answers

    In which classification of organisms is the body typically divided into a cephalothorax and an abdomen?

    <p>Arachnida</p> Signup and view all the answers

    What is the main function of hemolymph in insects?

    <p>Transporting nutrients and waste products</p> Signup and view all the answers

    Which anatomical feature in insects is responsible for feeding and sucking?

    <p>Proboscis</p> Signup and view all the answers

    What is the primary purpose of the femur in insects?

    <p>Locomotion</p> Signup and view all the answers

    What term describes the feeding behavior of insects that consume plant material?

    <p>Entomophagy</p> Signup and view all the answers

    Which anatomical feature of insects is involved in egg-laying?

    <p>Ovipositor</p> Signup and view all the answers

    What is the purpose of elytra in some insects?

    <p>Protection</p> Signup and view all the answers

    Study Notes

    Insect Anatomy

    • Compound eye: consists of a large number of individual photoreceptor units or ommatidia
    • Coxa: first leg segment, between body and trochanter
    • Dorsal: refers to the back or upper part of the body
    • Elytron: modified, hardened forewing of certain insect orders (e.g., beetles, true bugs)
    • Face: area between the base of antennae, oral margin, eyes, and cheeks (gena)
    • Femur: third leg segment, between trochanter and tibia
    • Forewing: pair of wings of a four-winged insect closest to the head
    • Frons: frontal area of an insect's head (forehead)
    • Gena: area below the compound eyes, equivalent to human cheeks
    • Geniculate: elbowed, referring to an organ with a definite angular bend or hinge (e.g., elbowed antenna)

    More Insect Anatomy

    • Hemocoel: interior of the insect's anatomy, including all organs and hemocytes (body cavity)
    • Hemolymph or haemocyte: fluid in the circulatory system containing nutrients, fat, water, etc. (blood)
    • Hindwing: pair of wings of a four-winged insect farthest from the head
    • Hypopharynx: mouthpart, a tonguelike lobe on the floor of the mouth
    • Imago: final, or adult, stage in metamorphosis
    • Labium: mouthpart forming the lower lip, bears labial palps
    • Labrum: anterior structure below the clypeus, covering some of the mouthparts (upper lip)
    • Maxilla: mouthpart, paired and arranged behind the mandibles, may bear palps

    Insect Body Structure

    • Mesothorax: middle segment of the thorax, between the prothorax and the metathorax
    • Metathorax: third and last segment of the thorax, after the mesothorax
    • Oviposition: act of laying eggs
    • Ovipositor: egg-laying structure
    • Parasitoid: parasite that develops attached to or within a host organism, ultimately killing the host
    • Pedicel: second segment (antennomere) of the antenna
    • Phytophagy: feeding on plants
    • Posterior: position behind or below the aforementioned

    Insect Appendages

    • Proboscis: tubular feeding and sucking organ
    • Proleg: fleshy leg-like structures arising from the abdominal segments of caterpillars, with crochets or curved hooks
    • Prothorax: first segment of the thorax, anterior to the mesothorax
    • Relatives of Insects

    Classes of Arthropods

    • Class Arachnida (spiders, mites, ticks, scorpions):
      • Tagmata: prosoma (cephalothorax) and opisthosoma (abdomen)
      • Appendages: chelicerae, pedipalps, and 4 pairs of legs
      • Simple eyes present; no antennae; no wings
      • Gonopore: hidden in anterior part of ventral surface of opisthosoma (embryologically segment 2)
      • Spinneret: silk spinning organ
    • Class Crustacea (crayfish, shrimps, crabs):
      • Tagmata: varied; head and thorax covered dorsally by an unsegmented carapace (shield-like plate)
      • Appendages: biramous (composed of 2 branches)
      • Compound eyes on long stalk
      • Head appendages: 2 pairs of antennae, 1 pair of mandibles, and 2 pairs of maxillae
      • Gonopores: 1 pair located on the base of posterior appendages of thorax
    • Class Chilopoda or Symphyla (centipede):
      • External segmentation is distinct
      • Tagmata: head and trunk
      • Head: 1 pair of antennae; mandibles; 2 pairs of maxillae
      • Trunk: with only 12 pairs of legs; most segments with 1 pair of legs, some without legs

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    Description

    Test your knowledge of common terminologies in entomology, including compound eye, coxa, dorsal, elytron, and entomophagy. Learn about the anatomical features and behaviors of insects through this quiz.

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