Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology aids to health immunization, treatment and antibiotics antibodies and antitoxin prevention and treatment of disease

Ozone is passed through swimming pool because it

  1. Absorbs UV radiations

  2. Acts as disinfectant
  3. Easily available from $O _2$

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

Ozone is an effective disinfectant. It is passed through the swimming pool and is used in water treatment units because of the following reasons:

1. It improves the smell and visibility of the water.
2. It destroys bacteria and viruses by causing their oxidation.
3. It oxidises metals like manganese, iron and sulphur into the soluble particles and so these can be easily filtered out.
4. It has a bleaching effect on the discoloured water.
Hence, the correct answer is 'Acts as disinfectant'.

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

Earthworm is a 

  1. Herbivore

  2. Secondary consumer

  3. Tertiary consumer

  4. Detrivore
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Decomposer is an organism which decomposes dead organic matter. They breakdown organic matter of dead animals and plants and release nutrients in the environment. Detritivores are also called as detritus eaters. They are heterotrophs that obtain nutrients by consuming detritus (decomposing plant and animal matter). Earthworm is an example of detrivore.

Thus, the correct answer is 'Detrivore.'

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

The last chain of food is

  1. producers

  2. decomposers

  3. parasites

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Producers are photosynthetic green plants. They are autotrophs as they convert solar radiations into chemical energy and prepare their own food.
B. Decomposers are micro consumers that reduce organic remains. They form the last step of the food chain because they breakdown detritus (the dead remains of plants and animals) into smaller particles.
C. Parasites are the organisms that live in or on the host organism from which they derive their nutrition.
So, the correct answer is 'Decomposers'.
Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

The decomposers in an ecosystem

  1. convert inorganic material, to simpler forms

  2. convert organic material to inorganic forms

  3. convert inorganic materials into organic compounds

  4. do not break-down organic compounds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Decomposers are micro consumers and include certain bacteria and fungi. They are known as saprophytes and release the minerals trapped in organic remains of plants and animals. The process of decomposition occurs outside the body of decomposers. They release enzymes on the organic dead remains which decompose them into simple inorganic substances which are absorbed by decomposers.
So, the correct answer is 'convert organic material to inorganic forms'.
Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

Which of the following microorganisms convert nitrogenous waste into nitrogen compound?

  1. Bacteria and Fungi

  2. Fungi and Protozoan

  3. Protozoan and Algae

  4. Protozoan and Bacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacteria and fungi belongs to the class of decomposers. They act on the waste materials and converts the nitrogen present in the waste to useful nitrogenous compounds. It also increases the nitrogen content of the soil and increases the fertility of the soil.

So, the correct answer is option A.

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

Which of the following is nature's cleaner?

  1. Consumers

  2. Producers

  3. Decomposers and scavengers

  4. Symbionts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A food chain is series of plants/animals which are interrelated in the form of organism being eaten as food by the other. It consists of producers, consumers and decomposers. Plants are producers. The herbivores are primary consumers and carnivores are secondary consumers. Decomposers and scavengers are those which decomposes the waster organic matter and release energy back in the environment. Hence, they are also called as nature's cleaner. They are present in the apex of the pyramid.
Thus, the correct answer is 'Decomposers and scavengers.'
Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

Bacteria and fungi are

  1. Scavengers

  2. Primary consumers

  3. Secondary consumers

  4. Decomposers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Decomposers are microorganisms which decomposes organic matter. These include bacteria and fungi. They breakdown organic compounds obtained from the dead animals and leaves and releases carbon and energy back in the environment. They usually occupy the apex of the pyramid.

Thus, the correct answer is 'Decomposers.'

Multiple choice biology interdependence in living beings - plants and animals animals as consumers scavengers and decomposers interdependence between plants and animals

A detritivore is a/an

  1. Animal feeding on plant matter

  2. Animal feeding on decaying organic matter

  3. Plant feeding on an animal

  4. Animal feeding on another animal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A detritivore is an animal feeding on decaying organic matter. It is a heterotroph that obtains nutrients by consuming detritus. Examples include millipedes, earthworms, fiddler crabs, sea cucumbers. 

Thus, the correct answer is 'Animal feeding on decaying organic matter.'