Question

Please tell me the subclasses of Cilitelata, Polychaeta and Gephyrea

(Just write the sub-classes of the three classes; Don't copy from Google; 7 points; best answer to be mark as brainliest)​

Answer 1

Answer:

The ciliates are a group of protozoans characterized by the presence of hair-like organelles called cilia, which are identical in structure to eukaryotic flagella, but are in general shorter and present in much larger numbers, with a different undulating pattern than flagella. Cilia occur in all members of the group (although the peculiar Suctoria only have them for part of their life-cycle) and are variously used in swimming, crawling, attachment, feeding, and sensation.

The Polychaeta also known as the bristle worms or polychaetes, are a paraphyletic[1] class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (Arenicola marina) and the sandworm or clam worm Alitta.

Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe Nereus at the bottom of the Challenger Deep, the deepest known spot in the Earth's oceans.[2] Only 168 species (less than 2% of all polychaetes) are known from fresh waters.[3]

Gephyra is a genus of snout moths. It was described by Francis Walker in 1859

Explanation:

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Answer 2

Answer:

Classification of Phylum Annelida

Phylum Annelida is divided into four main classes, primarly on the basis of setae, parapodia, metameres and other morphological features.

The active polychaetes utilize parapodia for gas exchange. Each parapodium is divided into an upper and a lower section; it is the upper section that serves a respiratory function. Muscles and locomotion: Annelids have two sets of muscles that are used to contract and elongate the body.

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