Exer
A. Define the following. Give examples also.
1. Producers
5. Decomposers
2. Primary consumers
3. Secondary consumers
6. Predators
7. An ecosystem
4. Scavengers
B. Do these in your notebook.
1. What would have happened had there been no carnivores?
2. Why are plants called producers?
3. Explain balance in nature.
4. What causes imbalance in nature? Give examples.
5. Explain energy flow.
Answers
Answer:
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
ANSWER:
Organisms that produce their own food from simple inorganic substances such as water and carbon dioxide are called producers. Examples are green plants and blue-green algae.
Organisms that consume the food prepared by producers are called consumers. Examples are cows and human beings.
(a) Define decomposers. Name one decomposer.
(b) What is the role of decomposers in the ecosystem?
ANSWER:
(a) Micro-organisms that break down the complex organic compounds present in dead plants and animals and their products, such as faeces and urine, into simpler substances are called decomposers. Bacteria are decomposers.
(b) Decomposers decompose dead plants and animals and hence act as cleansing agents of the environment.
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
ANSWER:
Herbivores that feed on plants are called primary consumers. Example: Insects.
Small carnivores that feed on other animals, especially herbivores, are called secondary consumers. Example: Frogs.
Large carnivores that feed on other animals, especially secondary consumers, are called tertiary consumers. Example: Birds.
Insects → Frogs → Birds
(Primary consumers) (Secondary consumers) (Tertiary consumers)
5)energy flow unidirectional.
Explanation:
1, 2,3) A consumer that eats both plants and animals is called an omnivore. Some examples of consumers include Camels, Scorpions, and Lizards. A decomposer is a living thing that consumes waste and dead organisms to get energy. Some examples of decomposers include Beetles, Earthworms, and Millipedes.
Secondary consumer:Secondary consumers are largely comprised of carnivores that feed on the primary consumers or herbivores. Other members of this group are omnivores that not only feed on primary consumers but also on producers or autotrophs. An example is a fox eating rabbit.
Ecosystem:
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
Balance in Nature::
The balance of nature (also known as ecological balance) is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change (the size of a particular population, for example) will be corrected by some negative feedback that will bring the parameter .
In balance in nature;
Ecological imbalance is when a natural or human-caused disturbance disrupts the natural balance of an ecosystem. A disturbance is any change that causes a disruption in the balance of an ecosystem. Examples of natural disturbances are. Volcanic eruptions. Floods.
why plants are consumer ?
Producers Consumers and Decomposers Game! Plants are called producers. ... Animals are called consumers. This is because they cannot make their own food, so they need to consume (eat) plants and/or animals.
May this answer helps you dear ☺️