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metazoa    
n. 后生动物

後生动物

Metazoa
n 1: multicellular animals having cells differentiated into
tissues and organs and usually a digestive cavity and
nervous system [synonym: {Metazoa}, {subkingdom Metazoa}]


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  • Metazooa
    Metazooa is a game that tests how well you know our extended family tree Your goal is to figure out today's Mystery Animal in as few guesses as possible Wrong guesses will narrow down the answer by taxonomic rank (kingdom, phylum, class, order, etc ) The more your guess has in common with the answer, the more you will learn about the Animal
  • What is the Difference Between Protozoa and Metazoa
    The main difference between Protozoa and Metazoa is that the protozoa is a group of unicellular primitive animals known as protists whereas metazoa is a group of multicellular animals Amoebae, flagellates, ciliates, and Sporozoa are the main forms of protozoans while the two main forms of metazoans
  • The origin of Metazoa: a unicellular perspective - Nature
    In this Review, we examine how comparative studies of the closest unicellular relatives of Metazoa have revolutionized our understanding of the unicellular ancestor of animals and, consequently,
  • Metazoa | animal | Britannica
    …origin of multicellular animals (metazoans) was long dominated by German embryologist Ernst Haeckel’s theory that the original metazoan ancestor was a spherical protozoan that was structurally similar to the cnidarians (e g , jellyfish and corals) Currently there are two alternative explanations The first traces metazoans back to
  • The rhizome of life: what about metazoa? - PMC - PubMed Central (PMC)
    Metazoa (animals) represent a group of multicellular eukaryotes (Haeckel, 1874) and constitute a monophyletic clade with heterotrophic organisms They are believed to have diversified around the beginning of the Cambrian period (∼543 million years ago)
  • Metazoa | Encyclopedia. com
    Metazoa (mĕt´əzō´ə), subkingdom of the animal kingdom comprising the multicellular animals in the traditional two-kingdom system of taxonomic classification, in which living organisms were considered to be either plants or animals
  • Metazoa - (General Biology I) - Vocab, Definition . . . - Fiveable
    Metazoa refers to a major clade of multicellular animals that are characterized by their complex tissue structures and diverse body plans This group encompasses all animals except for the unicellular organisms, establishing a fundamental distinction in the evolutionary history of life forms
  • Origins of the Metazoa - SpringerLink
    Metazoans – heterotrophic, multicellular organisms that posses eukaryotic cells Heterotrophs – organisms that must ingest organic carbon to support growth, unlike plants that are autotrophic and can use light to photosynthesize organic compounds
  • Systematics of the Metazoa - University of California Museum of . . .
    Metazoa: Systematics* "Why do evolutionary biologists care who's related to whom, and how do scientists find out how different animals are related?" Scientists care because phylogeny is the fundamental product of evolution Therefore, a phylogenetic hypothesis is essential if you want to understand biological phenomena, most of which have an





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