15.
16.
17.
Males are always smaller than the females and have a coiled posterior
(a) Ascaris lumbricoides
(b) Planaria
(c) Fasciola hepatica
(d) Taenia solium
Life-history of Ascaris lumbricoides involves
(a) two larval stages
(b) three larval stages
(c) four larval stages
(d) no larval stage
The adult Ascaris lumbricoides causes
(a) Amoebic dysentery
(b) Diarrhoea
(c) Abdominal pain
(d) Colic pain, appendicitis, abdominal tumour, gastric ulcer,
diarrhoea, nervous discomforts etc.
Ascaris lumbricoides completes its life-cycle in
(a) one hosts (b) two hosts (c) three hosts (d) four hosts
In Earthworm, spermathical pores are situated in the inter-segmento
between
(a) 5/6 and 8/9 segments (b) 4/5 and 7/8 segments
(c) 6/7 and 9/10 segments (d) 6/7 and 8/9 segments
The Earthworm is
(c) without sex
18.
19.
20.
Jocion
(b) Dioecious
Answers
Answer:
Helminths, i.e., parasitic worms, are a group of macroparasites encompassing a variety of species that can infect their hosts in three different ways: ingestion of eggs or larvae (e.g., via contaminated food and water or fecal-oral route), direct penetration of the skin, and via the bite of vectors (e.g., certain species of flies and mosquitoes). Helminths are classified based on their macroscopic appearance as nematodes (i.e, roundworms; genera include Toxocara, Enterobius, Trichuris, Ascaris, Trichinella, Strongyloides, Ancylostoma, Necator), cestodes (i.e.,tapeworms; genera include Taenia, Diphyllobothrium, Echinococcus), or trematodes (i.e., flukes; genera include Schistosoma, Metorchis, Fasciola). Most helminth species colonize the gastrointestinal tract of their hosts, provoking symptoms such as abdominal pain, nausea, and diarrhea. The larvae of certain helminth species, such as those of the Ascaris and Ancylostoma genus, migrate from the intestines via the portal vein to the lungs, potentially causing asthma-like symptoms (e.g., dry cough, wheezing). Other species, such as Taenia solium, are capable of colonizing other human tissue, such as the brain or the liver, which can lead to life-threatening complications (e.g., neurocysticercosis). Diagnosis of helminth infection is made primarily via evidence of eosinophilia in the blood and direct detection of worms, eggs, or larvae in stool samples. Serum IgE levels are often elevated. Treatment consists of anthelmintic agents, such as albendazole or praziquantel. For helminth infection prevention, see “Food and water safety” in the article on food poisoning. Echinococcosis and schistosomiasis are discussed in separate articles.
Answer:
1)a
2)a
3)c
4)a
5)a
6)c
Explanation: