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 starfish 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 and strychnine by plants is metabolic disorder |
The two correct statements 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 another organism and may kill it. |
4. | Host is an organism which provides food to another organism. |
Praying mantis is a good example of:
1. Mullerian mimicry
2. Warning colouration
3. Social insects
4. Camouflage