Tag: contaminated water spreads disease

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

Pressurised irrigation system has the advantage of.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pressurized irrigation systems, such as sprinklers, can help wash away pests like aphids and mites from the leaves of plants.

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

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

  1. One

  2. Two

  3. Three

  4. Zero
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Houseflies are important in breaking down of 

  1. Food

  2. Carbon bonds

  3. Decaying material

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

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

Adult housefly can also be known as

  1. Pupa

  2. Imago

  3. Puparium

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

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

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

  1. One

  2. Two

  3. Three

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

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

Why are houseflies not considered as biological vectors?

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Houseflies are considered mechanical vectors because they carry pathogens on their bodies and legs, transferring them directly to food or surfaces, rather than the pathogen undergoing a developmental cycle within the fly.

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

Housefly cannot take food unless it is in

  1. Digested state

  2. Liquid state

  3. Semisolid state

  4. Solid state
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Housefly feeds on sugar by

  1. Crushing its crystals and then sucking the powder

  2. Crushing and eating

  3. Sucking

  4. Dissolving in saliva and sucking.
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Mature larva of Housefly is

  1. Caterpillar

  2. Wriggler

  3. Grub

  4. Maggot.
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Pupa occurs in the life cycle of

  1. Cockroach

  2. Housefly

  3. Honey Bee

  4. Earthworm.
Reveal answer Fill a bubble to check yourself
B Correct answer
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',