This group of animals is known as marsupials. It includes animals such as the kangaroo, Tasmanian devil, wombat, koala, wallaby, quoll, bilby etc.
These insects either have hemimetabolous development, and undergo an incomplete or partial metamorphosis, or holometabolous development, which undergo a complete metamorphosis, including a pupal or resting stage between the larval and adult forms. In hemimetabolous insects, immature stages are called nymphs.
The immature form of an animal such as a tadpole is called larva.
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Most furry animals are considered fairly cute when immature. Well-known examples include puppies, kittens, chicks, ducklings, and kits (immature rabbits).
The germinal vesicle is a large, prominent nucleus found in the immature oocyte (egg cell) of female animals. It contains the genetic material of the cell and is essential for the early stages of oocyte maturation and development.
The differentiation of stem cells is not limited to immature animals. Stem cells have the ability to differentiate into specialized cell types in both immature and mature animals. However, the potential and efficiency of differentiation may vary depending on the developmental stage and the specific type of stem cell. In general, embryonic stem cells have a greater capacity for differentiation compared to adult stem cells, which may have more limited potential to differentiate into specific cell lineages.
As larval they are immature animals and undergoes metamophosis, e.g., tadpole.
The word that means immature tissue is "parenchyma." Parenchyma refers to the functional tissue in plants and animals that is involved in processes such as photosynthesis, storage, and support. In a broader context, "immature" tissue can also be referred to as "embryonic" or "undifferentiated" tissue, depending on the specific biological context.
Mollusks, sponges, and coral are among the "animals" that remain relatively stationary.
An acephalocyst is a larva filled with fluid, found in the tissues of man and lower animals, the immature stage of certain tapeworms.
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