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Nematodes: Free-Living and Parasitic Roundworms

10 Questions

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Nematodes: Free-Living and Parasitic Roundworms

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Questions and Answers

What is the cause of soil-transmitted helminthiases?

Parasitic nematodes (correct)

Tardigrades

Flatworms

Free-living nematodes

What distinguishes nematodes from flatworms?

Taxonomic classification

Moulting behavior

Tubular digestive system (correct)

Presence of Hox genes

In which clade are nematodes taxonomically classified?

Ecdysozoa (correct)

Protostomia

Deuterostomia

Arthropoda

What is the estimated number of nematode species according to a 2013 survey?

Over 25,000 Signup and view all the answers

Which phylum has kept the ancestral protostome Hox genotype?

Nematomorpha Signup and view all the answers

What is the phylum of nematodes?

Nematoda Signup and view all the answers

What do most nematode species feed on?

microorganisms Signup and view all the answers

What is the estimated number of nematode species according to a widely referenced article published in 1993?

over 1 million species Signup and view all the answers

What is the estimated number of nematode species according to a 2013 survey published in Zootaxa?

over 25,000 Signup and view all the answers

What is the cause of uncertainty in estimating the total number of extant nematode species?

difficulty in distinguishing nematode species Signup and view all the answers