Population Interactions Predation

Praying mantis is a good example of:

1. Mullerian mimicry

2. Warning colouration

3. Social insects

4. Camouflage

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 statements cannot be connected to Predation?

1.	It is necessitated by nature to maintain the ecological balance .
2.	It helps in maintaining species diversity in a community.
3.	It might lead to the extinction of a species.
4.	Both the interacting species are negatively impacted.

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (–) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (–) for another species involved in the interaction?

1.	Competition	2.	Predation
3.	Amensalism	4.	Commensalism