Insect Development and Growth Patterns
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Insect Development and Growth Patterns

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Questions and Answers

What is the process of shedding the old cuticle called?

  • Ecdysis (correct)
  • Metamorphosis
  • Molting
  • Embryogenesis

    • What is the term for the developmental history of an organism from egg to adult?

  • Ontogeny (correct)
  • Ecdysis
  • Morphogenesis
  • Metamorphosis

    • Which type of metamorphosis involves a complete transformation from egg to adult?

  • Hemimetabolous
  • Ametabolous
  • Exopterygota
  • Holometabolous (correct)

    • What is the term for the formation of new cuticle with a greater surface area?

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

    Which group of insects undergoes ametabolous development?

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

    What is the term for the process of development from egg to adult in insects?

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

    Which type of metamorphosis involves a series of nymph stages?

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

    What is the term for the process of growth in insects?

    <p>Discontinuous growth</p> Signup and view all the answers

    What is the stage of development shown in Figure A?

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

    What is the process of producing eggs in a female insect's body called?

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

    What is the purpose of the ovipositor in a female insect?

    <p>To lay eggs</p> Signup and view all the answers

    What is the term for the reproduction method where the female insect lays eggs?

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

    What is the function of the micropyle in an insect egg?

    <p>To allow sperm to enter the egg</p> Signup and view all the answers

    What is the stage of development shown in Figure F?

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

    How do female insects typically receive sperm from their male partners?

    <p>During the act of mating</p> Signup and view all the answers

    What is the term for the outermost layer of an insect egg?

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

    What is the first step in the molting process of insects?

    <p>The epidermis secretes a new epicuticle</p> Signup and view all the answers

    Which insects are referred to as nymphs?

    <p>Immature insects that undergo incomplete metamorphosis</p> Signup and view all the answers

    Which stage is NOT part of the complete metamorphosis process?

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

    What do mayflies indicate about water quality?

    <p>The water is of good quality</p> Signup and view all the answers

    Which insect group is noted for successfully using complete metamorphosis?

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

    What is the adult stage of a holometabolous insect called?

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

    What is the primary function of the spermatheca in female insects?

    <p>To store sperm for fertilization</p> Signup and view all the answers

    During fertilization, what process occurs between the sperm nucleus and the egg nucleus?

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

    What characterizes embryogenesis in insects compared to human development?

    <p>The egg is larger and full of yolk</p> Signup and view all the answers

    What is the fate of the ectodermal germ layer during insect development?

    <p>Becomes the epidermis and nervous system</p> Signup and view all the answers

    Which layer contributes to the formation of tissues such as the heart and muscles during insect development?

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

    Which type of pupae has developing appendages held tightly against the body by a shell-like casing?

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

    What initiates the embryogenesis process in insects?

    <p>The fertilization of the egg</p> Signup and view all the answers

    What describes the appearance of exarate pupae?

    <p>All developing appendages free and visible externally</p> Signup and view all the answers

    Which of the following insects is example of a coarctate pupa?

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

    Which organ system in insects is formed from the mesodermal layer?

    <p>Circulatory system</p> Signup and view all the answers

    What happens to the bee's egg once it becomes fertilized?

    <p>It undergoes mitosis and develops into an embryo</p> Signup and view all the answers

    What type of pupae are commonly found within a silken cocoon?

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

    Which insect family is an example of exarate adecticous pupae?

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

    In which type of pupae are the developing appendages visible and not tightly held against the body?

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

    Which of the following is NOT a pupal type listed in the content?

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

    What is a characteristic of exarate decticous pupae?

    <p>All appendages are free and visible</p> Signup and view all the answers

    Study Notes

    Insect Development and Growth

    • Insects have various growth phases: egg, immature development, and emergence of an adult.

    Life History Patterns & Structures

    • Insect growth is discontinuous, with size increases through molting (formation of new cuticle of greater surface area) and subsequent ecdysis (shedding of the old cuticle)
    • There are two forms of metamorphosis: incomplete and complete
    • Types of metamorphosis:
      • Ametabolous: no metamorphosis, characterized by a primitive developmental pattern
      • Hemimetabolous: incomplete metamorphosis, growth occurs through a series of molts
      • Holometabolous: complete metamorphosis, with four stages: egg, larva, pupa, and adult

    Hemimetabolism

    • Incomplete metamorphosis, characterized by growth from one nymph stage to the next through molting
    • Immature insects that undergo incomplete metamorphosis are called nymphs
    • Examples: southern green stink bug, dragonflies, and damselflies

    Holometabolism

    • Complete metamorphosis, with four stages: egg, larva, pupa, and adult
    • Characterized by significant changes in form and structure between stages
    • Examples: most successful insect groups, such as Endopterygota

    Egg Structure

    • In most insects, life begins as an independent egg through oviparity
    • Egg production by the female's body is called oogenesis, and the egg-laying process is called oviposition
    • Eggs are genetically unique and often physically distinct, with shapes such as spherical, ovate, conical, or sausage-shaped

    Ferilization

    • A female receives sperm from a male partner during mating
    • Sperm is stored in a special part of the female reproductive system, the spermatheca
    • As a developing egg moves past the opening to the spermatheca, a few sperm are released onto its surface
    • The sperm swim towards the micropyle, and the first one to reach its destination enters and injects its nucleus into the egg, forming a diploid zygote

    Embryogenesis

    • Embryogenesis is a developmental process that begins once the egg has been fertilized
    • It involves the multiplication of cells, growth, movement, and differentiation into all the tissues and organs of a living insect

    Morphogenesis

    • Morphogenesis is the process of forming the shape and structure of an insect
    • It involves the formation of germ layers (ectoderm, mesoderm, and endoderm) that give rise to different tissues and organs

    Pupal Types

    • Pupae can be grouped into three categories based on physical appearance:
      • Obtect (chrysalis-like)
      • Exarate (developing appendages free and visible externally)
      • Coarctate (body encased within the hard exoskeleton of the next-to-last larval instar)

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    Description

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