Do all plants have the same percent of biomass?

No, not all plants have the same percent of biomass. Biomass composition varies significantly among different plant species due to factors such as growth conditions, species type, and environmental adaptations. For example, woody plants generally have a higher biomass percentage in their stems compared to herbaceous plants, which tend to have more biomass in their leaves. Additionally, the proportions of carbohydrates, proteins, and other materials can differ widely based on the plant's ecological niche and life cycle.