These animals have a rudimentary structure in the collar region called stomochord, which is a structure similar to the notochord and hence the name hemichordates. Habitat: All members of this phylum are marine. Examples: Balanoglossus Saccoglossus Rhabdopleura. Body plan: They have organ-system level of organisation. Symmetry: They are bilaterally symmetrical. Germ layer: They are triploblastic … Read more
Electrolytic Cells Voltaic cells are operated by the spontaneous chemical reaction, which produces the electrical current through the external circuit. These cells are significant as they are the base for batteries which boost modern society. However, they don’t exist as the only type of electrochemical cell. In each case, the reverse reaction is non-spontaneous plus … Read more
The name of the phylum is derived from the presence of an endoskeleton of calcareous ossicles (Greek: echinos– hedgehog, derma– skin). Habitat: All echinoderms are exclusively marine. Body plan: The members have organ-system level of organisation. Examples: Asterias (Star fish) Echinus (Sea urchin) Antedon (Sea lily) Cucumaria (Sea cucumber) Ophiura (Brittle star) Symmetry: The adult … Read more
This phylum forms the second largest animal group in kingdom Animalia. Habitat: They can be terrestrial or aquatic. Examples: Pila (Apple snail) Pinctada (Pearl oyster) Sepia (Cuttlefish) Loligo (Squid) Octopus (Devil fish) Aplysia (Seahare) Dentalium (Tusk shell) Chaetopleura (Chiton) Body plan: They have organ-system level of organization. Symmetry: Molluscans are initially bilaterally symmetrical, but later … Read more
This is the largest phylum in Kingdom Animalia. Majority of the members are insects. Over two-thirds of all named species on earth are arthropods. The name is derived from the presence of jointed appendages (arthros-joint, poda-appendages) on the body. Habitat: They are found in a wide variety of habitats. Examples: Economically important insects: Apis (Honey … Read more
The body surface of Annelids are segmented and distinctly marked out into segments or metameres and, hence, the phylum name Annelida (Latin, annulus : little ring) Habitat: Annelids can be free-living or parasitic. They occupy both aquatic (marine or freshwater) and terrestrial habitats. Examples: Nereis Pheretima (Earthworm) Hirudinaria (Blood sucking leech). Body plan: The members … Read more
The body surface of Annelids are segmented and distinctly marked out into segments or metameres and, hence, the phylum name Annelida (Latin, annulus : little ring) Habitat: Annelids can be free-living or parasitic. They occupy both aquatic (marine or freshwater) and terrestrial habitats. Examples: Nereis Pheretima (Earthworm) Hirudinaria (Blood sucking leech). Body plan: The members … Read more
Electrolysis Process In simple words, the electrolysis process is the decomposition of the given element under the impact of the electric current. Or, Electrolysis refers to a method which uses a DC (direct current or direct electric current) to operate in other respects, the chemical non-spontaneous reactions. As per the financial perspective, electrolysis plays an … Read more
The cross sections of the members of aschelminthes are circular, and hence are called round worms. Habitat: Most of them are aquatic. They may be free-living or parasitic on plants and animals. Examples: Ascaris (Roundworm) Wuchereria (Filaria worm) Ancylostoma (Hookworm). Body plan: They have a tube-within-tube plan and organ-system level of body organization. Symmetry: The … Read more
The cross sections of the members of aschelminthes are circular, and hence are called round worms. Habitat: Most of them are aquatic. They may be free-living or parasitic on plants and animals. Examples: Ascaris (Roundworm) Wuchereria (Filaria worm) Ancylostoma (Hookworm). Body plan: They have a tube-within-tube plan and organ-system level of body organization. Symmetry: The … Read more