Which biome is characterized by high biodiversity?

Choose the incorrect sentence$(s)$ regarding latitudinal gradients.
$(I)$ Biodiversity throughout the world shows uneven distribution.
$(II)$ According to latitudinal gradient,there is no major difference in biodiversity.
$(III)$ Species diversity increases as we move away from the equator towards the poles.
$(IV)$ Biodiversity increases as we move from temperate to tropical regions.

What are the different patterns of biodiversity? Describe latitudinal gradients.

Approximately $25\%$ of all insects are known to be phytophagous (feeding on plant sap and other parts of plants).

What is the exact latitudinal range for tropical regions,which harbour more species than temperate or polar areas?

Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?