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1. royalsocietypublishing.org › doi › 10The evolution of insect metamorphosis: a developmental and ...

   royalsocietypublishing.org › doi › 10

   Aug 26, 2019 · Key transcription factors are associated with the holometabolous life stages: Krüppel-homolog 1 (Kr-h1) in the larva, broad in the pupa and E93 in the adult. Kr-h1 mediates JH action and is found whenever JH acts, while the other two genes direct the formation of their corresponding stages.

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     2. Evolution of the larval form (a) Developmental...

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3. www.cell.com › current-biology › fulltextThe Evolution of Insect Metamorphosis - Cell Press

   www.cell.com › current-biology › fulltext

   Dec 2, 2019 · Metamorphosis in insects, though, seems more mysterious as their external exoskeleton hides the gradual changes occurring inside, and one only sees the results when the old outer cuticle is abruptly shed, such as when the butterfly emerges from its chrysalis.

   • Author: James W. Truman

   • Publish Year: 2019

4. www.scientificamerican.com › article › insectHow Did Insect Metamorphosis Evolve? | Scientific American

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   Aug 10, 2012 · Holometaboly, or complete metamorphosis, refers to insects such as beetles, flies, butterflies, moths and bees, which hatch as wormlike larvae that eventually enter a quiescent pupal stage before...

   • Author: Ferris Jabr

5. www.thoughtco.com › types-of-insect-metamorphosisThe Types and Stages of Insect Metamorphosis - ThoughtCo

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   Jul 26, 2019 · Larvae grow and molt, usually multiple times. Some insect orders have unique names for their larval forms: butterfly and moth larvae are caterpillars; fly larvae are maggots, and beetle larvae are grubs. When the larva molts for the final time, it transforms into a pupa.

6. www.britannica.com › science › metamorphosisMetamorphosis | Insect Development, Adaptation & Evolution ...

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   Oct 8, 2024 · Metamorphic patterns are well-known in crabs, lobsters, and other crustaceans and also in snails, clams, and other mollusks. The larval form of the urochordate (e.g., the tunicate, or sea squirt) is tadpole-like and free swimming; the adult is sessile and somewhat degenerate.

   • Author: The Editors of Encyclopaedia Britannica

7. www.sciencedirect.com › science › articleThe Evolution of Insect Metamorphosis - ScienceDirect

   www.sciencedirect.com › science › article

   Dec 2, 2019 · The larval form, then, arises from the arrest of ancestral patterns of tissue growth and patterning. The structures that are organized prior to the arrest are adapted to the larval form, while the remainder of the primordium is carried forward to contribute to the adult system (Figure 2 A).

8. People also ask

   What is the significance of the larva in insect metamorphosis?

   • The first considerations of the significance of the larva in insect metamorphosis extend back to Aristotle (see [9, 10] for a discussion), and there have since been numerous ideas for how the larval and pupal stages of the Holometabola were derived from their hemimetabolous ancestors (summarized in ).

   The evolution of insect metamorphosis: a developmental and endocrine

   royalsocietypublishing.org/doi/10.1098/rstb.2019.0070

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   What happens during a larval transformation?

   • At this time the larva undergoes a transformation in which the wings appear externally, larval organs and tissues are broken down, and adult structures are developed. Hypermetamorphosis, a form of complete metamorphosis, occurs in some beetles, flies, and other insects and is characterized by a series of larval stages.

   Metamorphosis | Insect Development, Adaptation & Evolution | Britannica

   www.britannica.com/science/metamorphosis

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   What is the larval stage of complete metamorphosis?

   • In this way, the larval stage of complete metamorphosis corresponds to the pro-nymphal stage of incomplete metamorphosis. The pupal stage arose later as a kind of condensed nymphal phase that catapulted the wriggly larvae into their sexually active winged adult forms.

   How Did Insect Metamorphosis Evolve? | Scientific American

   www.scientificamerican.com/article/insect-metamorphosis-evolution/

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   How do holometabolous insects transition from larva to adult?

   • In holometabolous insects, the transition from larva to the adult takes place through the nonfeeding, transitional stage known as the pupa. The oldest unequivocal fossils of holometabolous larvae are from about 320 million years ago . Curiously, in this era of giant insects, the earliest holometabolans were quite small.

   The Evolution of Insect Metamorphosis: Current Biology - Cell Press

   www.cell.com/current-biology/fulltext/S0960-9822(19)31315-6

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   What happens after an insect leaves its egg?

   • After leaving its egg, an insect must grow and undergo a series of physical transformations until reaching adulthood. (Only adult insects can mate and reproduce.) The transformative changes an insect passes through as it moves from one stage of its life cycle to the next is called metamorphosis.

   The Types and Stages of Insect Metamorphosis - ThoughtCo

   www.thoughtco.com/types-of-insect-metamorphosis-1968347

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   How long does it take a butterfly to form?

   • In this stage, which takes anywhere from two weeks to several months, the insect’s tissues rearrange to form the features of an adult butterfly, including wings and antennae. Finally, the adult butterfly breaks through its chrysalis case fully-formed, though its wings are generally wet and scrunched.

   A Guide to the Butterfly Life Cycle - AMNH

   www.amnh.org/explore/news-blogs/news-posts/a-guide-to-the-butterfly-life-cycle

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9. www.amnh.org › a-guide-to-the-butterfly-life-cycleA Guide to the Butterfly Life Cycle | AMNH

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   Oct 4, 2017 · A butterfly larva first emerges from its egg as a caterpillar, chewing its way out of its protective shell. It keeps munching large quantities of leaves, growing and shedding its skin as it outgrows it.