Answer:Tall, perennial grasses and herds of grazing herbivores are inhabitants of tropical and temperate biomes and not desert biomes.
Deserts do not support the growth of perennial grasses and a sustained herd population.
A desert is an arid landscape with very little to no rainfall through the years.
Plants needs water to manufacture their food and live.
Since this condition is absent, they cannot thrive in such biomes.
Grazing herbivores needs a lot of grasses to satisfy their foraging and ruminant nature.
Since grasses are lacking, they cannot survive.