Tag: zoology

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Questions Related to zoology

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Infective state of Entamoeba histolytica is 

  1. Spore

  2. Tetranucleated cyst

  3. Egg

  4. Trophozoite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Entamoeba histolytica complete its life cycle in two stage on one host only infective stage and colon invasive trophozoite stage.  In infective stage, infection occurs by the ingestion of tetranucleated cyst through the contaminated food and water. So, the correct answer is option B.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Choose the correct statement.

  1. Filariasis occurs by Trichoderma

  2. Housefly is the vector of amoebiasis

  3. Culex acts as vector for malaria

  4. Ascariasis occurs by droplet infection
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Filariasis is a parasitic disease caused by an infection with roundworms such as Wuchereria bancrofti.
  • Amoebiasis, also known as amoebic dysentery, is an infection caused by Entamoeba. The housefly transmits pathogens via touch or from bodily fluids, including from their saliva, faeces, vomit, and urine. Housefly act as a vector for amoebic dysentery, typhoid, cholera, Trachoma, tapeworm, roundworm, leprosy, mycoses etc.
  • Malaria is a mosquito-borne infectious disease that affects humans and other animals. The vector for malaria is female Anopheles mosquito.
  • Ascariasis is a disease caused by the parasitic roundworm Ascaris lumbricoides. The source of infection is from objects which have been contaminated with faecal matter containing eggs.
So, the correct answer is 'Housefly is the vector of amoebiasis'.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

State whether the following statement is true or false.
Malaria is spread by the female Anopheles mosquito.

  1. True

  2. False

  3. Ambigous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Female Anopheles mosquito is a vector for Malarial parasite. Infection occurs when the mosquito bites an infected person and then later on bites a healthy person, while it feeds on the blood of the host.

So, the statement is 'true'

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

In sickle cell anaemia the deformity is in

  1. WBCs

  2. Platelets

  3. RBCs

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Normal RBCs are disc-shaped and can move easily through the blood vessels. RBCs contain haemoglobin, which carries oxygen from lungs to rest of the body. Sickle cells contain abnormal haemoglobin called sickle haemoglobin or haemoglobin S. This causes the RBCs to develop sickle or crescent shape. These cells are stiff and sticky and tend to block the blood flow in the blood vessels, which can cause pain and organ damage and also increased the risk for infection. So, the correct answer is option C.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which of the following transmits visceral leishmaniasis?

  1. $Phlebotomus$
  2. $Cimex$
  3. $Glossina$
  4. $Culex$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phlebotomus is a genus of sand flies. They are primarily responsible for the transmission of leishmaniasis, an important parasitic disease. The most common forms are cutaneous leishmaniasis which causes skin sores and visceral leishmaniasis which affects several internal organs.
Therefore, the correct answer is option A.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Sandfly is a vector for

  1. Trypanosoma evansi

  2. Trypanosoma gambiense

  3. Leishmania donovani

  4. Trypanosoma cruzi
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$Phlebotomus$ $argentipes$ is the vector for visceral leishmaniasis in India. The development of resistance in kala-azar vector to DDT has been reported from various parts of India. Phlebotomus sand flies are primarily responsible for the transmission of leishmaniasis, an important parasitic disease, while transmission in the New World, is generally via sand flies of the genus $Lutzomyia$. The protozoan parasite itself is a species of the genus $Leishmania$. Leishmaniasis normally finds a mammalian reservoir in rodents and other small animals such as  canine leishmaniasis and hyraxes. The female sand fly carries the Leishmania protozoa from infected animals after feeding, thus transmitting the disease, while the male feeds on plant nectar.
Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which of the following pair is correctly matched?

  1. Leishmania - kala azar

  2. Giardia - sleeping sickness

  3. Entamoeba - malaria

  4. Plasmodium - dysentry
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Kala azar is also known as 'black fever' and is considered to be the most severe form of leishmaniasis. It is caused by the protozoans of Leishmania genus. 

Sleeping sickness or african trypanosomiasis is a parasitic disease caused by Trypanosoma brucei.
Malaria is a mosquito borne disease caused by the group of protozoans, known as Plasmodium. 
Amoebic dysentery is caused by Entamoeba histolytica.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

Which one of the following is polymorphic?

  1. Taenia solium

  2. Trypanosoma

  3. Paramoecium

  4. Entamoeba
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The occurrence of more than one form of an individual  in a single species within an interbreeding population is known as polymorphism. Trypanosoma shows this feature with three main forms, all of which have a small kinetoplast and a conspicuous undulating membrane. Hence, option B is correct.

Multiple choice zoology some common diseases diseases caused by protozoa protozoan disease protozoa: benefits and harmful effects

The African tsetse fly spreads

  1. Sleeping sickness

  2. Malaria

  3. Filaria

  4. Yellow fever
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Human African trypanosomiasis, also known as sleeping sickness, is a vector-borne parasitic disease. It is caused by infection with protozoan parasites belonging to the genus Trypanosoma. They are transmitted to humans by tsetse fly (Glossina genus) bites which have acquired their infection from human beings or from animals harbouring the human pathogenic parasites.

So, the correct answer is 'Sleeping sickness'.