What is the proportion of Arthropods among animal species?

The medicinal plant $Rauwolfia$ $vomitoria$ produces which chemical?

In India, we find mangoes with different flavours, colours, fibre content, sugar content and even shelf-life. The large variation is on account of

The variation shown by the medicinal plant $Rauwolfia \text{ } vomitoria$ growing in different Himalayan ranges represents:

Define/Explain: Endemism.

Within biological communities,some species are important in determining the ability of a large number of other species to persist in the community. Such species are called