The Takeout on MSN15d
Why The Food Pyramid Is Now Considered Super Outdated
If you grew up in the '90s, you remember the Food Pyramid. It's now outdated, but why hasn't the USDA provided better health guidelines?
BBC3y
Pyramids of number and biomass
A pyramid of biomass shows the mass - in grams or kilograms - of the population of the trophic levels in a food chain. The bar for the producer at the bottom of the pyramid of number can be small ...