Practice question

Height records among living gymnosperms belong to Cupressaceae redwood family: Sequoia sempervirens coastal northern California fog belt attains 115 meter tallest tree on Earth Hyperion, Sequoiadendron giganteum Sierra Nevada most massive single organism girth and biomass. Conifer dominance structural due to efficient embolism-resistant tracheids with torus-margo, resin-based chemical herbivore defense terpenoids and evergreen needle-like leaves minimizing nutrient loss winter. Pines generally shorter usually less than 80 meters slender, cycads cycadophytes palm-like short pachycaulous trunks few meters resembling ferns ancient, Gnetum scandent woody liana climbing. Tall growth requires hydraulic efficiency and structural wood provided coniferous secondary xylem and deep roots.