Practice question

Pollination syndrome in gymnosperms predominantly anemophily: tall emergent canopies produce massive amounts lightweight non-sticky saccate pollen often with air bladders bisaccate in Pinaceae providing buoyancy long-distance, ovules produce pollination droplets sugary capturing airborne grains retracting via evaporation into micropyle bringing pollen to nucellus. Reliance wind advantageous sparse populations and lack showy perianth nectar rewards. Entomophily secondary in cycads pollinated by thrips beetles obligate mutualism and some Gnetum visited moths, but wind remains primary. Insect bird water pollination typical angiosperm specializations co-evolved with animal vectors elaborate mechanisms, not primary gymnosperm strategy despite occasional ambophily combining wind insects.