Study the four statements $(i-iv)$ given below and select the two correct ones out of them.

$(i)$ A lion eating a deer and a sparrow feeding on grains are ecologically similar in being consumers.

$(ii)$ Predator star fish Pisaster helps in maintaining species diversity of some invertebrates.

$(iii)$ Predators ultimately lead to the extinction of prey species.

$(iv)$ Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders.

The two correct statements are

Which of the following supports a dense population of plankton and littoral vegetation?

A population characteristic of a species susceptible to extinction is

Which of the following taxon shows maximum species diversity?

Assertion : Tropical rain forests are disappearing fast from developing countries such as India.
Reason : No value is attached to these forests because these are poor in biodiversity