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Jellyfish — Research Starter
Jellyfish are ancient, gelatinous animals found predominantly in tropical and subtropical marine environments, with origins traceable back over 650 million years. These creatures exhibit a simple body…
Isolating mechanisms in evolution — Research Starter
Isolating mechanisms in evolution are biological processes that prevent interbreeding between distinct species, thereby maintaining their genetic integrity. These mechanisms are classified into two…
Invertebrates — Research Starter
Invertebrates are a diverse group of animals that lack a backbone and primarily inhabit aquatic environments, although some species have adapted to land. They display a variety of body plans, which…
Invertebrate chordates — Research Starter
Invertebrate chordates, part of the phylum Chordata, include two primary subphyla: Tunicata (tunicates) and Cephalochordata (lancelets). These organisms exhibit key chordate features, such as a…
Insects — Research Starter
Insects are an incredibly diverse class of invertebrates that have existed for approximately 400 million years, dating back to the Devonian period. With over one million identified species and…
Insect societies — Research Starter
Insect societies, particularly among social insects like ants, bees, wasps, and termites, are fascinating examples of complex organizational structures that enhance survival and reproductive success.…
Ingestion in animals — Research Starter
Ingestion in animals is the vital process through which food is taken into the body to meet nutritional and energy needs. While all animals share basic nutritional requirements, the mechanisms of…
Infanticide (zoology) — Research Starter
Infanticide in zoology refers to the intentional killing of dependent young by members of the same species, occurring across various animal classes. The victims can range from fertilized eggs to those…
Hydrostatic skeletons — Research Starter
Hydrostatic skeletons are structures found in various organisms that utilize fluid-filled cavities for support and movement, relying on muscle contractions to manipulate the pressure of the contained…
Hybrid zones (zoology) — Research Starter
Hybrid zones in zoology refer to regions where distinct species meet, mate, and produce hybrid offspring. These zones are significant for understanding evolutionary processes, as they can lead to gene…