Tag: interdependence in living beings - plants and animals

Questions Related to interdependence in living beings - plants and animals

Read the following statements and select the incorrect one.

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

  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.

Show answer
Correct Option: B
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'

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 

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

  1. True

  2. False

Show answer
Correct Option: B
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'.

In a natural ecosystem, decomposers include

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

  1. Only microscopic animals

  2. Only bacteria and fungi

  3. The above two types of organisms plus microscopic animals

  4. None of the above

Show answer
Correct Option: B
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.

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

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

  1. Decomposers

  2. Producers

  3. Primary consumers

  4. Secondary consumers

Show answer
Correct Option: A

In the food chain, the saprophytic organisms are

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

  1. Producers

  2. Consumers

  3. Predators

  4. Decomposers

Show answer
Correct Option: D
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. 

Which of the following is not true for reducers ? 

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

  1. Reduces inorganic remains of earth

  2. Essential component of an ecosystem

  3. Help in cycling of nutrients

  4. Also called natural scavengers

Show answer
Correct Option: A
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'.

Decomposers helps in ______

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

  1. Breaking dead waste

  2. Recycle nutrients

  3. Both A and B

  4. Spreading decay

Show answer
Correct Option: C
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.

Most important group of decomposers includes

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

  1. Bacteria

  2. Fungi

  3. Both A and B

  4. Virus

Show answer
Correct Option: C
Explanation:

Explanation: Bacteria and fungi are decomposers. They break down waste products and dead organisms for food.

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

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

  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.

Show answer
Correct Option: D
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.