Why Do Plants Have Seeds? Functions Beyond Reproduction

Overview

Angiosperms (flowering, seed-producing plants) beautify gardens and fill kitchens. Their seeds accomplish more than simple reproduction.

Identification

Seeds result from sexual/asexual reproduction, developing in ovaries or fruits post-fertilization—often aided by bees, hummingbirds, or other pollinators.

Reproduction

Primary function: species continuation. Critical for annuals that don't easily reproduce by division.

Evolution

Early land plants used spores (single-celled). As plants diversified, seeds evolved: first soft-sided on gymnosperms, then hard-coated angiosperm seeds with embryo and food supply.

Improvements

Seed production enables hybridization—pollen from another species fertilizes an egg, creating seeds with improved/stronger embryos.

Retirement

As long as plants produce seeds (or blooms/fruits are removed), they keep growing, less vitally. Seed maturation signals the plant to begin dying back so seeds can mature and disperse.