Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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 not an example of pray predator relationship?

  1. Tiger eating a deer

  2. Plant Nepenthes trapping an insect

  3. Bacteria decomposing organic matter

  4. Crocodile killing a man
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bacteria decompose the organic matter which is not really living. hence, it cannot be considered as a pray-predator relationship.

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

Read the following statements and select the incorrect one.

  1. Little decomposition occurs during the formation of primary sludge

  2. formation of primary sludge requires ample aeration.

  3. Activated sludge possess flocs of decomposer microbes

  4. Formation of activated sludge requires aeration.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Little decomposition occurs during the formation of primary sludge. Activated sludge possess flocs of decomposer microbes. Formation of activated sludge requires aeration. But formation of primary sludge does not requir ample aeration. So, the correct option is 'Formation of primary sludge requires ample aeration'

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

State whether the following statements are true or false.
A food relation in which an animal feeds on a dead animal or one killed by anothr animal is known as predation 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Predation is the biological interaction where an organism called predator feeds on the other living organism called prey. It plays an important role in the distribution and diversity of the species in the ecosystem.

So, the correct option is 'True'.

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

In a natural ecosystem, decomposers include

  1. Only microscopic animals

  2. Only bacteria and fungi

  3. The above two types of organisms plus microscopic animals

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

Bacteria are important decomposers; they are widely distributed and can break down any type of organic matter. The primary decomposers of litter in many ecosystems are fungi. Unlike bacteria, which are unicellular organisms, most saprotrophic fungi grow as a branching network of hyphae. While bacteria are restricted to growing and feeding on the exposed surfaces of organic matter, fungi can use their hyphae to penetrate larger pieces of organic matter. Fungi decompose organic matter by releasing enzymes to break down the decaying material, after which they absorb the nutrients in the decaying material.

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

In recycling of mineral elements within an ecosystem, the responsible direct acing organism are called

  1. Decomposers

  2. Producers

  3. Primary consumers

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

Decomposers are the direct agents that break down organic matter, thereby releasing mineral elements back into the ecosystem for reuse by producers.

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

In the food chain, the saprophytic organisms are

  1. Producers

  2. Consumers

  3. Predators

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

Fungi and bacteria are known as saprophytes. Saprophytes are decay organisms and are responsible for getting dead animals and plants to rot (decompose). They break down the remains into simple chemicals, e.g., nitrates, which contain nitrogen, an important element needed by plants. Without saprophytes the soil would quickly run out of nutrients and the plants would have no food. 

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 not true for reducers ? 

  1. Reduces inorganic remains of earth

  2. Essential component of an ecosystem

  3. Help in cycling of nutrients

  4. Also called natural scavengers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There are four components of the ecosystem namely, abiotic substances, producers, consumers, and reducers also called as decomposers. 

The reducers are an essential component of the ecosystem as they help in the cycling of the nutrients by breaking down the dead organic matter (animal and waste matter) and therefore also called as natural scavengers. Eg- fungi and certain bacteria species.
So, the incorrect statement from the given statements is 'Reduces inorganic remains of the earth'.

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

Decomposers helps in ______

  1. Breaking dead waste

  2. Recycle nutrients

  3. Both A and B

  4. Spreading decay
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Decomposers are also unable to make their own food. Hence, they break down waste products and dead organisms for food. These broken down materials are returned to the soil to be recycled and used by plants again.

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

Which statement is correct about the role of decomposers in the environment?

  1. Decomposers break down the dead and decaying organic matter.

  2. Decomposers return the nutrients to the soil.

  3. Decomposers play a very important role in the nutrient re-cycling.

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

Decomposers are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals. As the decomposers feed on the dead animals, they break down the organic compounds into simple nutrients to the soil. Organic matter is recycled in an ecosystem by decomposers.