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Phylum Mollusca- Characteristics, Classification, Examples

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Phylum Mollusca (Mollusks) Definition Phylum Mollusca, commonly referred to as mollusks, are segmented, coelomate organisms with soft bodies, bilateral symmetry, and a dorsal visceral mass. They are typically covered in shells. Phylum Mollusca (Mollusks) Characteristics The majority of them are aquatic—mostly marine, with some terrestrial and rare freshwater forms. They could’ve been found within different animals, …

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Phytoplankton Vs Zooplankton- Definition, 16 Differences, Examples

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Phytoplankton Vs Zooplankton Overview Phytoplankton Definition The free-floating microalgae known as phytoplankton play a significant role in the ecosystems of the ocean, sea, and freshwater bodies of water. The terms “phyto” and “plankton,” which both imply drifter in Greek, are combined to form the word “phytoplankton.” Since phytoplanktons get chlorophyll to produce their own nourishment, …

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Phylum Coelenterata (Cnidaria): Characteristics, Classification, Examples

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Phylum Coelenterata (Cnidaria) Definition: Phylum Coelenterata (Cnidaria) are defined as diploblastic metazoa having a nematocyst and a single gastrovascular cavity, or coelenteron, as the tissue construction grade. Phylum Coelenterata (Cnidaria) Characteristics They are aquatic, with the exception of a few freshwater species, such as the hydra. They are multicellular and organised at the tissue level. …

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Phylum Hemichordata- Characteristics, Classification, Examples

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Phylum Hemichordata Definition It is contested if they are Phylum hemichordata, which indicates they are “half” or “part” chordates (Greek: hemi, half; chorde, cord). Typically, they are vermiform, solitary or colony enterocoelous coelomate creatures lacking normal nephridia and with an intra-epidermal nervous system. Phylum Hemichordata Characteristics They are entirely marine, tubicolous, and solitary or colony. …

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Classification Of Bacteria

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Classification Of Bacteria Overview Classification Of Bacteria are classified and recognised to separate one organism from another and to categorise similar species according to standards relevant to microbiologists or other scientists. Numerous purposes are served by bacterial categorization. Bacteria may be categorised using a wide range of different typing methods as a result of their …

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Phylum Annelida- Characteristics, Classification, Examples

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Phylum Annelida definition Phylum Annelida are described as coelomate worms with a thin, flexible cuticle all around that are triploblastic, bilaterally symmetrical, and segmented metamerically. Phylum Annelida Characteristics Most of them are aquatic; some are freshwater or marine; some are terrestrial; some are sedentary or free-living; and some are commensal and parasitic. The body is …

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Protozoa: Definition, Characteristics, Classification, Examples

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Protozoa Definition Protozoa are “microscopic acellular animalcules that exist single or in colonies, are devoid of tissue and organs, and have one or more nuclei.” Some of the characteristics are: Approximately 50,000 species of Protozoa are known. Protozoans primarily demonstrate two modes of existence: free-living (aquatic, freshwater, and marine) and parasitic (ectoparasites or endoparasites). Also, …

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Phylum Nematoda-Characteristics, Classification, Examples

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Phylum Nematoda Definition As opposed to flatworms and higher segmented annelids, nematodes (Greek: nema thread+ eidos, form) are also known as thread worms or pinworms. Phylum Nematoda Characteristics They are abundant, aquatic or terrestrial, parasitic or nonparasitic, and ubiquitous. This creature’s body is elongated, cylindrical, segmentless, worm-like, bilaterally symmetrical, and tapered at both ends. They …

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Phylum Platyhelminthes-Characteristics, Classification, Examples

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Phylum Platyhelminthes (flatworms) definition Phylum Platyhelminthes are acoelomate flatworms that are triploblastic, bilaterally symmetrical, dorsoventrally flattened, and lack a distinct circulatory, skeletal, or respiratory system, but do have a protonophridial excretory system and mesenchyme that fills the spaces between the body’s numerous organs. Phylum Platyhelminthes (flatworms) characteristics They can be parasitic, commensal, or free-living. They …

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Phylum Porifera-Characteristics, Classification, Examples

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Phylum Porifera Definition The Phylum Porifera can be described as asymmetrical or radially symmetrical multicellular organisms without clearly defined tissues and organs, exclusively aquatic, mostly marine, sedentary, solitary, or conical animals, with bodies perforated by pores, canals, and cambers through which water flows, with one or more internal cavities lined with choanocytes, and with a …

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