Which of the following is an example of Chaetognatha?
Which of the following is an example of Chaetognatha?
They are found in all marine waters, from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped, but some deep-sea species are orange….Chaetognatha.
| Arrow worms Temporal range: | |
|---|---|
| Class: | Sagittoidea Claus & Grobben, 1905 |
| Orders |
What does the name Chaetognatha mean?
Chaetognatha, meaning bristle-jaws, and commonly known as arrow worms, are a phylum of predatory marine worms that are a major component of plankton worldwide. About 20% of the known species are benthic, and can attach to algae and rocks. There are more than 120 modern species assigned to over 20 genera.
Is chaetognaths Triploblastic?
Triploblastic relationships with emphasis on the acoelomates and the position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha: a combined approach of 18S rDNA sequences and morphology.
Is jellyfish a Meroplankton or Holoplankton?
Jellyfish are the largest example of holoplankton. They remain in the planktonic zone for life and can grow as large as 8 feet, with tentacles up to 200 feet. Meroplankton are eggs and larvae of nearly all species of fish and benthic invertebrates.
Are Chaetognatha Deuterostomes?
Chaetognaths have generally been considered close relatives of the deuterostomes, a long-established major animal group that includes chordates, such as humans, and echinoderms, such as sea urchins.
Are Chaetognatha deuterostomes?
Is jellyfish a Holoplankton?
What are Holoplankton? Holoplankton spend their entire lives as part of the plankton. This group includes krill, copepods, various pelagic (free swimming) sea snails and slugs, salps, jellyfish and a small number of the marine worms. To most people jellyfish are probably the most visible and best known of this group.
Are crab larvae Holoplankton or Meroplankton?
Meroplankton consist of larval and young stages of animals that will adopt a different lifestyle once they mature. For example bottom-living animals such as crabs and lobsters enter the plankton as larvae for the purpose of dispersion. Also many fish are planktonic in the early stages of their development.
