Tag: diseases caused by mosquitoes

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

Common House Fly (Musca nebulo) lays eggs on

  1. Cow/Horse dung

  2. Stagnant water

  3. Hanging ropes

  4. Open meats and sweets.
Reveal answer Fill a bubble to check yourself
A 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 feces.
  • House fly eggs are laid in almost any warm, moist material that will supply suitable food for the larvae. For example, Cow/Horse dung.
  • Hence Common House Fly (Musca nebulo) lays eggs on Cow/Horse dung.
  • So, the correct answer is 'Cow/Horse dung.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Immature stage of housefly is

  1. Caterpillar

  2. Nymph

  3. Grub

  4. Maggot.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult(mature stage) from the larva(immature stage). The order of metamorphosis in Housefly is Egg, larva or maggot, pupa, and adult.
  • 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. They hatch after about 12 hours and the larvae, or maggots(immature stage), 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(mature stage) within 10 days.
  • Hence Immature stage of a housefly is Maggot(larva).
  • 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

Maggot of Housefly is

  1. Pupa

  2. Larva

  3. Chrysalis

  4. Imago.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult from the larva. The order of metamorphosis in Housefly is Egg, larva or maggot, pupa, and adult.
  • 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.
  • Hence Maggot of Housefly is larva.
  • So, the correct answer is 'Larva'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

The order of metamorphosis in Housefly is

  1. Egg, nymph, pupa and adult

  2. Egg, larva, nymph and adult

  3. Egg, larva, pupa and adult

  4. Egg, pupa, larva and adult.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Metamorphosis is defined as the series of changes that occur during the development of adult from the larva.
  • The order of metamorphosis in Housefly is Egg, larva, pupa, and adult.
  • So, the correct answer is 'Egg, larva, pupa, and adult'.
Multiple choice biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Houseflies act as a ___________ source for birds.

  1. Protein

  2. Carbon

  3. Mineral

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

Houseflies are generally found feeding and breeding on trash and rotten food where they get attached to several pathogens which are further transmitted by these flies to a healthy host. Housefly pupae contain large amounts of protein and are thus especially beneficial to the various birds, reptiles, and insects that prey on them. 

So, the correct answer is option A.

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

When domestic sewage mixes with river water

  1. Small animals like rats will die after drinking river - water

  2. The increased microbial. activity releases micronutrients such as iron

  3. The increased microbial activity uses up dissolved oxygen

  4. The river water is still suitable for drinking as impurities are only about 0.1%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BOD (biochemical oxygen demand) refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria. The BOD test measures the rate of update of oxygen by microorganisms in a sample of water and thus, indirectly BOD is the measure of the organic matter present in the water. The greater the BOD of wastewater more is its polluting potential. 

So, the correct answer is 'Small animals like rats will die after drinking river - water'.