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Understanding Nematodes: A Quiz on Their Biology and Parasitism

This quiz tests your knowledge on nematodes, their classification, parasitic relationships, and biological characteristics.

#Nematodes #Parasitology #Biology #Helminths #Taxonomy

1 Traditionally, they were held to be a lineage of their own, but in the 1990s it was proposed that they form a clade together with moulting animals such as ________.

2 Then the taxon Nematoidea has been promoted to the rank of phylum by ________ (1877) including the family Gordiidae (horsehair worms).

3 Nematodes commonly parasitic on humans include ascarids (Ascaris), filarids, ________, pinworms (Enterobius) and whipworms (Trichuris trichiura).

4 ________ is excreted in the form of ammonia through the body wall, and is not associated with any specific organs.

5 Traditionally, they are divided into two classes, the Adenophorea and the Secernentea, and initial DNA sequence studies suggested the existence of five ________:[8]

6 Nematode sperm is thought to be the only eukaryotic cell without the globular protein ________.

7 ________: A helminth infection of humans caused by the dog or cat roundworm, Toxocara canis or Toxocara cati

8 [12] Some nematodes are ________, and keep their self-fertilized eggs inside the uterus until they hatch.

9 ________ sperm crawl along the spicule into the female worm.

10 ________: A human disease caused by the parasitic roundworm Ascaris lumbricoides

💡 Interesting Facts

  • the nematode Elaeophora sagitta is a parasite that infests the heart and blood vessels of animals such as buffaloes and kudus in Africa.
  • the nematode Elaeophora poeli is a parasite that is found in the heart or aorta of various species of cattle.
  • the nematode Skrjabinoclava kinsellai is characterized by the presence of shoe-like and nipple-like structures.
  • the king stropharia, a prized edible mushroom, develops spiny cells which kill nematodes.
  • the soil-dwelling nematode-killing fungus Paecilomyces lilacinus has been known to cause human eye infections.
  • the nematode Elaeophora elaphi is a parasite that infests the hepatic blood vessels of Red Deer in Spain.
  • the nematode Capillaria plica is a parasite found in the urinary bladder of dogs, cats and various mammals.
  • although related species usually infect several hosts, the parasitic nematode worm Aonchotheca forresteri is known only from the marsh rice rat.
  • nematode Angiostrongylus vasorum lives in the hearts of dogs.
  • in addition to human spaceflight, there have been many animals in space, including monkeys, apes, mice, dogs, guinea pigs, frogs, rats, cats, tortoises, fish, newts, insects, snails, spiders and nematodes.
  • some members of the fungal family Orbiliaceae can lasso nematodes using outgrowths of their hyphae.
  • the nematode Capillaria aerophila is a parasite that infests the respiratory system of carnivorous mammals, including dogs and foxes.
  • chimpanzees in the wild may self-medicate by swallowing the leaves of Aneilema aequinoctiale (pictured) whole, in order to rid their intestines of parasitic nematodes.
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