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When did the phylum platyhelminthes appear on earth?
The phylum Platyhelminthes is believed to have appeared on Earth during the Ediacaran period, around 550 million years ago. They are one of the earliest known groups of multicellular organisms.
Why are dugongs Phylum Cordata?
Dugongs are Phylum Chordata because they possess a notochord at some point in their development, which is a defining characteristic of the phylum. This notochord provides structural support for the body and is present in all chordates at some stage of their life cycle.
Why is bat kept under phylum chordata?
Bats are classified as Chordates because they fit with the common characteristics of the phylum; they have, for at least some period of their life cycles, a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail. All mammals, including bats, are members of the phylum Chordata.
Do all rodents belong to the phylum chordata?
Yes, all rodents belong to the phylum Chordata. The phylum Chordata includes all animals with a notochord at some stage of their development, which is a defining feature of this phylum. Rodents, like all mammals, have a notochord during their embryonic development, placing them in the Chordata phylum.
What are the animals included in the phylum chelicerata?
The subphylum Chelicerata constitutes one of the major subdivisions of the phylum Arthropoda, and includes horseshoe crabs, scorpions, spiders, mites, harvestmen, ticks, and Solifugae. The chelicerata originated as marine animals, possibly in the Cambrian period, but the first confirmed chelicerate fossils, eurypterids, date from 445 million years ago in the Late Ordovician period. The surviving marine species include the four species of xiphosurans (horseshoe crabs), and possibly the 1,300 species of pycnogonids (sea spiders), if the latter are chelicerates. On the other hand, there are over 77,000 well-identified species of air-breathing chelicerates, and there may be about 500,000 unidentified species.
When did Phylum Chordata first appear?
Phylum Chordata first appeared over 500 million years ago during the Cambrian period in the early Paleozoic era. It includes vertebrates such as fish, amphibians, reptiles, birds, and mammals, making it one of the most diverse and successful groups of animals on Earth.
When did the phylum platyhelminthes appear on earth?
The phylum Platyhelminthes is believed to have appeared on Earth during the Ediacaran period, around 550 million years ago. They are one of the earliest known groups of multicellular organisms.
What is plylum chordata of a lion?
The phylum Chordata of a lion includes characteristics such as having a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail at some stage in their development. These features are present in the lion during its embryonic stage and are common to all members of the Chordata phylum, including mammals like lions.
What scientific phylum is the platypus in?
Like all mammals, the platypus is in the phylum Chordata. All animals which have a spine, or backbone, are classified in the phylum Chordata. There are three subphylums in Chordata: Urochordata (tunicates), Cephalachordata (lancelets), and Vertebrata (vertebrates). The platypus is a vertebrate. This phylum also includes all animals which have a hollow nerve cord and a notochord at some stage during their development. In the case of vertebrates, the notochord is present in the embryo, and develops into the vertebral body.
Why are dugongs Phylum Cordata?
Dugongs are Phylum Chordata because they possess a notochord at some point in their development, which is a defining characteristic of the phylum. This notochord provides structural support for the body and is present in all chordates at some stage of their life cycle.
Why is bat kept under phylum chordata?
Bats are classified as Chordates because they fit with the common characteristics of the phylum; they have, for at least some period of their life cycles, a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail. All mammals, including bats, are members of the phylum Chordata.
Do all rodents belong to the phylum chordata?
Yes, all rodents belong to the phylum Chordata. The phylum Chordata includes all animals with a notochord at some stage of their development, which is a defining feature of this phylum. Rodents, like all mammals, have a notochord during their embryonic development, placing them in the Chordata phylum.
What are the animals included in the phylum chelicerata?
The subphylum Chelicerata constitutes one of the major subdivisions of the phylum Arthropoda, and includes horseshoe crabs, scorpions, spiders, mites, harvestmen, ticks, and Solifugae. The chelicerata originated as marine animals, possibly in the Cambrian period, but the first confirmed chelicerate fossils, eurypterids, date from 445 million years ago in the Late Ordovician period. The surviving marine species include the four species of xiphosurans (horseshoe crabs), and possibly the 1,300 species of pycnogonids (sea spiders), if the latter are chelicerates. On the other hand, there are over 77,000 well-identified species of air-breathing chelicerates, and there may be about 500,000 unidentified species.
Which phylum shows the presence of sponge in fibres in its organisms?
Some members of Phylum Porifera show presence of spongin fibers . These fibers are present only in some fresh water sponges which are used as bath sponges .
What are the characteristics of sycon?
it is present in phylum poriferaThey are vas like marine animals they lack mouth digestive cavity etc.
What phylum is an echinoderm in?
Echinoderms are the phylum. The phylum is Echinodermata Echinoderms are the phylum. The phylum is Echinodermata Echinoderms are the phylum. The phylum is Echinodermata
What are 10 characteristics of sycon?
it is present in phylum poriferaThey are vas like marine animals they lack mouth digestive cavity etc.
