Saprophytes and Decomposers

Q.

What will be the consequence of the absence of decomposers in the ecosystem?

Q.

Explain the role of decomposers in the environment.

Q.

The decomposers in an ecosystem:

(a) convert the inorganic material to simpler forms

(b) convert organic material to inorganic forms

(c) convert the inorganic material into organic compounds

(d) do not break down organic compounds

Q.

One of the following is not a biodegradable material. This one is:

(a) cotton

(b) animal bones

(c) aluminium foil

(d) wood

Q.

Which of the following are decomposers of dead organisms?

$\begin{array}{ccc}\text{Bacteria}& \text{Fungi}& \text{Viruses}\\ \text{(a) no}& \text{yes}& \text{yes}\\ \text{(b) yes}& \text{no}& \text{yes}\\ \text{(c) yes}& \text{yes}& \text{no}\\ \text{(d) yes}& \text{yes}& \text{yes}\end{array}$

Q.

One of the following is a micro-consumer. This one is:

(a) ant (b) lice (c) fungi (d) mosquito

Q. _____ are called 'nature's cleaners'.

1. Producers
2. Consumers
3. Decomposers
4. Carnivores

Q.

One of the following helps in the recycling of materials in an ecosystem. This one is:

(a) autotrophs (b) saprotrophs (c) omnivores (d) carnivores

Q.

Which of the following act as decomposers in an ecosystem?

(a) Lactobacillus bacteria (b) Cyanobacteria (c) Putrefying bacteria (d) Rhizobium bacteria

Q.

What is a decomposer?

Q.

Are all archaebacteria decomposers?

Q.

Dead organic matter which is rich in nutrients is called ___.

Q.

We do not clean ponds or lakes but an aquarium needs to be cleaned periodically. Why?

Q.

Which of the following is true regarding decomposition of dead animals or plants?

1. Nutrients are absorbed by plants and decomposers in soil.

2. Complex organic nutrients are converted into simple inorganic nutrients.

3. Complex inorganic nutrients are converted into simple organic nutrients.

4. Fertility of soil is decreased gradually.

Q.

Question 19
The decomposers in an ecosystem

(a) convert inorganic material, to simpler forms
(b) convert organic material to inorganic forms
(c) convert inorganic materials into organic compounds
(d) do not break down organic compounds

Q. The decomposers in an ecosystem ______.

1. Convert inorganic materials into organic compounds
2. Convert inorganic materials to simpler forms
3. Convert organic materials to inorganic forms
4. Do not breakdown organic compounds.

Q. One of the following helps in the recycling of materials in an ecosystem. This one is :
(a) autotrophs
(b) saprotrophs
(c) omnivores
(d) carnivores

Q.

Question 32
What are decomposers? What will be the consequence of their absence in an ecosystem?

Q.

Bacteria plays important role in an ecosystem because

1. they act as producers.

2. they act as decomposers.

3. they act as consumers.

4. they act as parasites.

Q.

Which structure shows a carboxylic acid?

1. 

2. 

3. 

4. 

Q. Which of these is the major function of bacteria and fungi in an ecosystem?

1. Degradation of organic matter
2. Fixation of nitrogen and phosphorus
3. Absorption of inorganic nutrients
4. Degradation of inorganic matter

Q. In an ecosystem, bacteria and fungi perform the role of .

1. producers
2. consumers
3. decomposers

Q. One of the following is not a biodegradable material. This one is :
(a) cotton
(b) animal bones
(c) aluminium foil
(d) wood

Q. The biodegradable material among the given options is
(a) paper
(b) plastic
(c) detergent
(d) glass

Q. I have a question
That you say plastic and aluminium are non biodegradable . So my question is why they are say non biodegradable because plastic and aluminium decomposed after several years.