Describe the adaptive radiation in Polychaeta by citing examples.
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The process of evolution of different species starting from a point in a geographical area and finally radiating to other areas of geography is called adaptive: radiation, e.g. Darwin’s finches. Darwin observed different types of beaks in the same black bird in Galapagos Islands and he concluded that this was due to adaptation for different situations
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Class Polychaeta shows the greatest diversity in Phylum Annelida. Majority of the 5000 species of polychaetes are marine and exhibit a variety of habits and habitats for which they show anatomical and physiological adaptations.
PLANKTONIC POLYCHAETES
Planktonic polychaetes swim near the surface of the sea where the danger of predators and solar radiation is excessive.
CRAWLING POLYCHAETES
Crawling polychaetes belong to order Errantia which includes marine, freely moving animals that crawl on sea bottom.
BURROWING POLYCHAETES
Many polychaetes, such as Nereis crawl on the seabed in night in search of food and burrow in the soil in day time.
TUBICOLOUS POLYCHAETES
Tubicolous polychaetes live permanently inside the tubes made of mud, shell or sand grains, parchment or calcium carbonate.
COMMENSAL POLYCHAETE
Myzostoma is a commensal that lives in the tubes of other polychaetes or with sea cucumbers and sea stars.
PARASITIC POLYCHAETES
Histriobdella lives as ectoparasite in the gill chamber of crustaceans and sucks blood.
Read more on Brainly.in - https://brainly.in/question/1241502#readmore
PLANKTONIC POLYCHAETES
Planktonic polychaetes swim near the surface of the sea where the danger of predators and solar radiation is excessive.
CRAWLING POLYCHAETES
Crawling polychaetes belong to order Errantia which includes marine, freely moving animals that crawl on sea bottom.
BURROWING POLYCHAETES
Many polychaetes, such as Nereis crawl on the seabed in night in search of food and burrow in the soil in day time.
TUBICOLOUS POLYCHAETES
Tubicolous polychaetes live permanently inside the tubes made of mud, shell or sand grains, parchment or calcium carbonate.
COMMENSAL POLYCHAETE
Myzostoma is a commensal that lives in the tubes of other polychaetes or with sea cucumbers and sea stars.
PARASITIC POLYCHAETES
Histriobdella lives as ectoparasite in the gill chamber of crustaceans and sucks blood.
Read more on Brainly.in - https://brainly.in/question/1241502#readmore
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