Why Are Strawberry Seeds are Outside.

The "seeds" on the outside of a strawberry are actually called "achenes." Each achene is a small, seed-like fruit that contains a single seed inside. They are technically not seeds themselves but rather fruits produced by the strawberry flower's ovary.

Strawberries belong to a group of plants called the "aggregate fruits," where each flower produces a cluster of small fruits. The fleshy part of the strawberry that we eat is derived from the receptacle (the thickened part of the stem where the flower's parts are attached), while the achenes develop from the ovary of each flower.

The reason achenes are on the outside of a strawberry is due to the way the strawberry flower develops and matures. As the receptacle grows and expands after pollination, it surrounds the achenes that develop from the flowers. This creates the characteristic texture and appearance of a strawberry, with the seeds (achenes) embedded on its surface.

In summary, the achenes (seeds) of a strawberry are on the outside because they develop from the ovaries of the strawberry flower and are surrounded by the receptacle as it matures into the fruit we recognize. This unique arrangement is a defining feature of strawberries among fruits.