Is it true that in the food chain, heterotrophs are secondary and tertiary consumers?

In a food chain, heterotrophic organisms are typically secondary and tertiary consumers. Primary consumers are usually herbivores, which are organisms that consume plants or plant-based material. Secondary consumers are usually carnivores, which are organisms that consume other animals. Tertiary consumers are organisms that consume secondary consumers. They are also referred to as top predators. Heterotrophic organisms such as bacteria, fungi, and animals consume other organisms as their source of energy and nutrients and play a vital role in the ecosystem.