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General Biology: Evolution and Development Concepts

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Termini in questo insieme (15)

  • Ribozyme

    A ribozyme is an RNA molecule capable of catalyzing specific biochemical reactions, similar to protein enzymes.

  • Radiometric dating

    Radiometric dating is a method used to determine the age of rocks and fossils by measuring the decay of radioactive isotopes.

  • Half life

    Half life is the time required for half of the radioactive atoms in a sample to decay.

  • Stromatolite

    Stromatolites are layered sedimentary formations created by the growth of cyanobacteria, some of the oldest evidence of life on Earth.

  • Endosymbiosis

    Endosymbiosis is the theory that certain organelles, like mitochondria and chloroplasts, originated as free-living bacteria engulfed by ancestral eukaryotic cells.

  • Mass extinction

    A mass extinction is a widespread and rapid decrease in the biodiversity on Earth, eliminating many species in a relatively short time.

  • Adaptive radiations

    Adaptive radiations are rapid evolutionary diversifications of a single lineage into many species adapted to different environments.

  • Heterochrony

    Heterochrony refers to evolutionary changes in the timing or rate of developmental events, affecting organism shape and size.

  • Paedomorphosis

    Paedomorphosis is a form of heterochrony where adults retain traits previously seen only in juveniles.

  • Microevolution vs. Macroevolution

    Microevolution involves small genetic changes within a population, while macroevolution refers to large-scale evolutionary changes that can result in new species.

  • Paleozoic Era

    The Paleozoic Era (about 541-252 million years ago) is known for the emergence of diverse marine life and the first land plants and animals.

  • Mesozoic Era

    The Mesozoic Era (about 252-66 million years ago) is the age of reptiles, including dinosaurs, and the first birds and mammals.

  • Cenozoic Era

    The Cenozoic Era (about 66 million years ago to present) is the age of mammals and flowering plants, with significant diversification of life.

  • Homeotic genes

    Homeotic genes control the development of anatomical structures in various organisms by regulating the identity of body parts.

  • Hox genes

    Hox genes are a subset of homeotic genes that determine the head-to-tail body axis and segment identity in animals.