Tag: Organismal biology

Over 97% of all animal species are invertebrates, and the diversity of their feeding mechanisms is vast. The single, overarching biological term for the process of taking food into an organism's body is called ingestion. This critical first step in nutrition varies dramatically across the biological world, from the simple to the complex.

An estimated 99.9% of life on Earth depends on one of two fundamental nutritional strategies. In the broader biological sense, **what are the two processes of nutrition** that sustain all living organisms?

Over 78% of the Earth's atmosphere is nitrogen, a crucial element for most life, but the primary nutrient for an organism depends entirely on its physiology. The simple question "Which is the primary nutrient answer?" does not have a single, universal answer because nutritional needs are specific to the organism, whether human, plant, or microbe. This guide explores the different primary nutrients essential for various life forms.