What are Plants? Plants are many celled organisms that have cell walls and make their own food using the sun’s energy (photosynthesis). Most plants live on land, and the resources they need are separated by the air and soil. ____________________________________ are in the air, and __________________________ are in the soil. - Plants have _________ that access water and nutrients in the soil, and ___________________ that collect light and gases from the air. The roots and leaves are connected by _________________________. Classification of Plants ___________________: have no vascular tissue (mosses, bryophytes, liverworts) _____________: have vascular tissue No Seeds (ferns, club mosses) ____________________: flowering plants ______________________: nonflowering plants; conifers (pines, firs) – make cones _____________: have 2 cotyledons, branched veins, flowers in 4x or 5x, and taproots _______________: have 1 cotyledon (seed leaf), parallel veins, flowers in 3x, fibrous roots Plants reproduce with sex cells and with spores. Their life cycle has two stages: a. __________________________________: makes spores b. ________________________________: makes sex cells (gametes) Winter Trees There are two ways to identify trees in the winter: - _________________________ - _________________________ ______________________________ (gymnosperms) are woody plants that produce seeds inside of cones. - They are also known as ________________________. - They are adapted to living in much dryer conditions; their needle-like leaves lose little water. - They also retain their leaves throughout the year; instead they _______________________ their needles throughout the year (instead of losing them all in the fall). Directions for using the tree finder guides: 1. Select a ______________________ from the tree you wish to identify. Avoid freaks. 2. Start at the top of page 5. 3. Proceed step by step, considering both choices under each symbol. 4. When you have made your final choice, arriving at the name of the leaf, compare your leaf with the illustration and check the other features shown.