Match the items in Column-I with those in Column-II:

Select the correct option from the following:

1. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

2. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

3. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

4. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

Study the four statements (a–d) given below and select the two correct ones out of them –
a. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
b. Predator star fish Pisaster helps in maintaining species diversity of some invertebrates
c. Predators ultimately lead to the extinction of prey species
d. Production of chemicals such as nicotine, strychnine by the plants are metaboilic disorders
The two correct stament are-
1. a and d
2. a and b
3. b and c
4. c and d

Which one of the following is most appropriately defined -

1. Amensalism is a relationship in which one species is benefited whereas the other is unaffected

2. Predator is an organism that catches and kills other organism for food.

3. Parasite is an organism which always lives inside the body of other organism and may kill it.

4. Host is an organism which provides food to another organism.