What is the proportion of Arthropods among animal species?

India has nearly ..... varieties of plants. (in $,000$)

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

What percentage of the total oxygen in the Earth's atmosphere is produced by the Amazon rainforest (in $\%$)?

According to the representation of global biodiversity proportions for the number of species of major taxa of vertebrates,select the appropriate option for the labels $X$,$Y$,and $Z$ in the given figure.

Which one of the following is not observed in biodiversity hotspots?