Tag: contaminated water spreads disease

Questions Related to contaminated water spreads disease

Pressurised irrigation system has the advantage of.

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

  1. Washing away pests from the plants

  2. Conservation of water to maximum extent

  3. Conservation of fertilizer in the soil

  4. Production of hydroelectricity

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Correct Option: A

The thorax of housefly contains ........... pairs of legs.

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

  1. One

  2. Two

  3. Three

  4. Zero

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Correct Option: C
Explanation:

Housefly belongs to the largest phylum known as arthropoda which is characterized by joint appendages. The thorax of housefly contains three pairs of legs. The legs have sharp claws and spines which help the fly to cling to objects.

So, the correct answer is option C.

Houseflies are important in breaking down of 

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

  1. Food

  2. Carbon bonds

  3. Decaying material

  4. None of the above

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Correct Option: C
Explanation:

Houseflies belong to a group of flies called filth flies because they get food from breaking down decaying material. Such type of nutrition is called a saprophyte. If there were no saprophytes, then there would be no top soil for plants to grow in. 

Adult housefly can also be known as

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

  1. Pupa

  2. Imago

  3. Puparium

  4. Maggot

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Correct Option: B
Explanation:

Housefly undergoes several phases during metamorphosis. The mature egg turns into a larva which grows to pupa which finally forms an imago. Imago is generally colourless. Its wings are colourless and immobile.

So, the correct answer is option B.

Head of housefly bears .......... compound eyes.

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

  1. One

  2. Two

  3. Three

  4. Four

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Correct Option: B
Explanation:

Compound eyes mainly provide the mosaic pattern of vision as they don't have the well-developed brain to analyze the formed image. The image is formed as repeating units known as ommatidia. The head of the housefly bears two compound eyes.

So, the correct answer is option B.

Why are houseflies not considered as biological vectors?

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

  1. They do not spread diseases

  2. They do not transmit disease directly

  3. They are parasites and not vectors

  4. They transmit the diseases directly

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Correct Option: D

Housefly cannot take food unless it is in

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

  1. Digested state

  2. Liquid state

  3. Semisolid state

  4. Solid state

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Correct Option: B
Explanation:
Once a housefly sniffs something interesting and tastes it with its feet and palps, the time has come to gobble up the delicious morsel. If the meal in question happens to be liquid already, then the task is easy. Since the housefly's mouth parts are designed to sponge and ingest liquefied food, it's just a matter of turning on the suction. The food goes straight into the fly's stomach. Solid food is slightly more difficult. Houseflies can't bite or chew -- they simply don't have the proper equipment.

So, the correct answer is 'Liquid state'.

Housefly feeds on sugar by

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

  1. Crushing its crystals and then sucking the powder

  2. Crushing and eating

  3. Sucking

  4. Dissolving in saliva and sucking.

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Correct Option: D
Explanation:
  • Adult houseflies never have chewing mouthparts. They use saliva to change solids to liquids. Sponge-like mouthparts pick up semi-liquid foods, such as feces and decaying matter.
  • Hence Housefly feeds on sugar by Dissolving in saliva and sucking because they do not have chewing mouthparts.
  • So, the correct answer is '.Dissolving in saliva and sucking'.

Mature larva of Housefly is

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

  1. Caterpillar

  2. Wriggler

  3. Grub

  4. Maggot.

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Correct Option: D
Explanation:
  • The female housefly usually mates only once and stores the sperm for later use. She lays batches of about 100 eggs on decaying organic matter such as food waste, carrion, or faeces. These soon hatch into legless white mature larvae, known as maggots.
  • This larval stage is further followed by pupa and adult stages.
  • Hence Mature larva of Housefly is Maggot.
  • So, the correct answer is 'Maggot'.

Pupa occurs in the life cycle of

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

  1. Cockroach

  2. Housefly

  3. Honey Bee

  4. Earthworm.

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Correct Option: B
Explanation:
  • The pupal stage occurs only in holometabolic insects i.e those that undergo a complete metamorphosis, going through four life stages; egg, larva, pupa, and imago(adult). For example, Housefly, Beetle, Butterfly, moths, wasps, etc.
  • During the time of pupation, that the adult structures of the insect are formed whilst the larval structures are broken down.
  • Hence Pupa occurs in the life cycle of Housefly.
  • So, the correct answer is 'Housefly',