Tag: contaminated water spreads disease

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Questions Related to contaminated water spreads disease

Multiple choice evs mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease water borne diseases mosquito and human health

Mosquito larvae can be prevented to grow in ponds$/$ rice fields by inoculating them with

  1. Microcystis

  2. Aphanizomenon

  3. Oscillatoria

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

There are different ways to prevent mosquito larvae to grow in ponds and rice fields. These can be done by not allowing the water to get stagnant. Also, it can be prevented by inoculating it with Microcystis cyanobacteria. Microcystis aeruginosa causes death of the larvae by producing neurotoxins and hepatotoxins.

Thus, the correct answer is 'Microcystis.'

Multiple choice evs hygiene - a key to healthy life mosquito and human health mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Mosquito breeding occurs in 

  1. Stagnant water.

  2. Sea.

  3. River.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Mosquitoes breed in stagnant, standing fresh water oftentimes found around the home. In tin cans, buckets discarded tires and other artificial containers that hold stagnant water. In untended pools, birdbaths, clogged rain gutters, and plastic wading pools that hold stagnant water.

So, the correct answer is 'Stagnant water.'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The lifespan of housefly is upto 

  1. 30 days

  2. 3 weeks

  3. 3 days

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Houseflies live for up to 3 weeks and are active during the warmer part of the year. An adult female deposits 50 to 100 eggs at a time and about 500 eggs over her lifetime. The eggs are deposited in rotting organic matter. They hatch after about 12 hours and the larvae, or maggots, feed on the rotting organic material. A maggot passes through three larval stages and then forms a pupa, or cocoon. The adult fly emerges from the cocoon. Houseflies typically develop from egg to adult within 10 days. 

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The most common carrier of communicable diseases is

  1. Ant

  2. Housefly

  3. Dragonfly

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

The diseases, which spread from one person to another person or from animal to person are called as communicable diseases. It is also termed as infectious or contagious diseases. Housefly is a major factor in contributing communicable diseases. Housefly comes in contact with waste products and eatables. When it flies from wastes to eatables, it transports bacterial agents from wastes to eatables. Due to consumption of such eatables, the persons infected with microbes of various diseases, person gets sick. 

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Which of the following is the most common carrier of pathogens?

  1. Bees

  2. Mosquito

  3. Housefly

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

House flies are the vectors of several infectious agents. The pathogen may attach with flies when they sit on the waste materials. They cause typhoid, cholera, salmonellosis, dysentery, tuberculosis, anthrax, and parasitic worms carried to human food on the fly’s body parts or in its regurgitations or defecations.

Therefore, the correct answer is option C.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

One of the first measures taken to control houseflies is 

  1. The use of aerosols.

  2. Maintaining sanitation.

  3. Setting up fly traps.

  4. The use of insecticides.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sanitation is the primary method for controlling houseflies because it removes their breeding grounds, such as decaying organic matter and waste.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The life cycle of the common housefly follows which pathway?

  1. Egg $\rightarrow $ Pupa $\rightarrow $ Larva $\rightarrow $ Adult fly
  2. Egg $\rightarrow $ Adult fly $\rightarrow $ Larva $\rightarrow $ Pupa
  3. Egg $\rightarrow $ Larva stage 1 $\rightarrow $ Larva stage 2 $\rightarrow $ Adult fly
  4. Egg $\rightarrow $ Larva $\rightarrow $ Pupa $\rightarrow $ Adult fly
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The housefly undergoes complete metamorphosis, which consists of four stages: egg, larva (maggot), pupa, and adult.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The housefly also acts as a ___________.

  1. Nutritional source for humans

  2. Predators

  3. Scavengers

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

House Flies are generally, found feeding and breeding on trash and rotten food where they get attached to several pathogens which is further transmitted by these flies to a healthy host.  As houseflies and their larvae feed, on dead remains of plants and animals. So, they act as a scavenger.

Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

What sanitation measures should be taken to eliminate housefly?

  1. Food should be covered properly.

  2. Garbage cans should have tight lids.

  3. Buildings should be screened.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Effective housefly control requires a combination of measures, including covering food, securing garbage, and screening buildings to prevent access and breeding.