Butter is a common lipid that is used for energy storage and it contains both unsaturated and saturated fatty acids. Lipids are a necessary structural component of living cells.

There is lichen growing on this rock. Lichen is the combined growing condition of algae and fungus and is usually found in terrestrial habitats.

Wine is an example of fermentation. Fermentation is the anaerobic cellular process where organic foods are transformed into less complex compounds and ATP is produced.

This leaf is a gymnosperm leaf because the seeds are located in the pods of the leaf instead of being inside the ovary of the plant.

An endotherm is an organism that produces its own heat through internal means such as shivering or increasing its metabolism. My friend’s cat would be an example of an endotherm.