Transcripción 26/1/2026, 6:07:46 p. m.

Apuntes

• Plants Reproduction **Sexual vs. Asexual Reproduction** • Sexual reproduction involves two parents—pollen from a male part and ovule from a female part—and results in offspring with genetic variation. • Asexual reproduction involves one parent and produces genetically identical offspring (clones). **Sexual Reproduction in Plants** • Main steps: • Pollination — transfer of pollen from the anther (male) to the stigma (female). It can occur via wind, water, or animals such as bees, birds, or bats. • Fertilization — pollen reaches the ovule, and sperm fuses with the egg to form a seed. • Seed development and dispersal — seeds develop inside fruits or cones and are spread by wind, water, animals, or mechanical means. • Flower structure: • Stamen = anther (produces pollen) + filament • Pistil (carpel) = stigma (receives pollen) + style + ovary (contains ovules) Example: A bee visits a flower for nectar, picks up pollen, and transfers it to another flower’s stigma. This pollination leads to fertilization and seed formation. **Ways Pollination Happens** • Wind pollination: Many grasses and trees produce large amounts of lightweight pollen, often without bright petals o...