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Roots
Deciduous trees are trees that lose their leaves. Trees that don't lose their leaves are "Evergreens". Evergreen trees have needles, instead of flat leaves, to survive winter hardship. Needles cut evaporation so trees can save water - dear in the winter. Not all trees that bear needles are evergreen, for example the larch drops it's needles in the Autumn.
Deciduous trees are trees that lose their leaves. Trees that don't lose their leaves are "Evergreens". Evergreen trees have needles, instead of flat leaves, to survive winter hardship. Needles cut evaporation so trees can save water - dear in the winter. Not all trees that bear needles are evergreen, for example the larch drops it's needles in the Autumn.
== == If you don't water them, they will get dried out and drop needles.
Blue spruce trees may lose needles at the bottom due to stress factors such as lack of water, poor soil conditions, or pests. It is important to address these issues promptly to help the tree regain its health.
Needles on trees in the boreal forest help reduce water loss through transpiration compared to broad leaves. Needles also have a thick waxy coating that protects them from cold temperatures and helps them retain moisture. Their shape allows them to shed snow easily, reducing the risk of branches breaking under heavy snow loads.
The "needles" on a pine tree or other conifer are the plant's leaves, where photosynthesis takes place. The needles are long and slender because of the environment of the trees. Needles lose less water and heat than typical leaves.
cuticle
The waxy covering on pine needles serves to reduce water loss by minimizing evaporation, which is crucial for the tree's survival in dry or cold environments. This waxy layer also helps protect the needles from harsh weather conditions, pests, and diseases. Additionally, it aids in reflecting sunlight, helping to regulate the temperature of the needles and maintain photosynthesis efficiency. Overall, it enhances the pine tree's resilience and adaptability.
Trees lose water through transpiration (the passing of water vapor to the atmosphere). Pine needles are waxy, have a small surface area and have a groove in which the stomata are located. These features reduce transpiration.
Needles float on water because needles are less dense than water. This is partially because the water is so much larger of a substance than the needles.
the cuticle prevents dessication