Sameer while studying the topic of 'Interdependence between organisms' found that some organisms live together and benefit each other. Which of the following is a suitable example of such a relationship ?

1. Algae
2. Bacteria
3. Fungi
4. Lichen

Predators are the animals who chase other animals, kill them and feed on their flesh. Which of the following statements supports this given explanation?

P. They are carnivores.

Q. They belong to trophic level-2 of the food chain.

R. They are also considered as decomposers.

1. Only P
2. Only Q and R
3. Only P and Q
4. Only P and R

Assertion (A): All plant eating animals are considered as primary producers.

Reason (R): Producers are the first step of the food chain which can supply food to the next trophic level.

1. Both A and R are true.
2. Both A and R are false.
3. A is true and R is false.
4. A is false and R is true.

Assertion (A): An ecosystem consists of two categories of components Biotic and Abiotic which are interdependent on each other.

Reason (R): Biotic components are dependent on abiotic components but never on other biotic components.

1. Both A and R are true.
2. Both A and R are false.
3. A is true and R is false.
4. A is false and R is true.