do oak trees make sap?
99074
All trees create thier own sap. It is the "blood" of trees.
977858
Yes, deciduous trees like oaks and maples will lose their leaves in winter, even if the winter season is very, very short. Palm trees keep their leaves year round, so it could be considered an evergreen too even if it's not a pine or cedar.
943391
Leaves are nature's food factories. Plants take water from the ground through their roots. They take a gas called carbon dioxide from the air. Plants use sunlight to turn water and carbon dioxide into glucose. Glucose is a kind of sugar. Plants use glucose as food for energy and as a building block for growing. The way plants turn water and carbon dioxide into sugar is called photosynthesis. That means "putting together with light." A chemical called chlorophyll helps make photosynthesis happen. Chlorophyll is what gives plants their green color. \n\n\nAs summer ends and autumn comes, the days get shorter and shorter. This is how the trees "know" to begin getting ready for winter. \n\nDuring winter, there is not enough light or water for photosynthesis. The trees will rest, and live off the food they stored during the summer. They begin to shut down their food-making factories. The green chlorophyll disappears from the leaves. As the bright green fades away, we begin to see yellow and orange colors. Small amounts of these colors have been in the leaves all along. We just can't see them in the summer, because they are covered up by the green chlorophyll. \n\nThe bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color. The brown color of trees like oaks is made from wastes left in the leaves. \n\nIt is the combination of all these things that make the beautiful colors we enjoy in the fall.
566783
Herbs generally do not have woody parts although they can still grow quite large and sturdy. The banana tree is technically a type of herb since its stem does not form permanent woody tissue.
560032
Trees do NOT get water to their leaves using cappilary action alone. Cappilary action could lift water to maybe 10 metres maximum. The tallest trees are over 8 times that height. Cappilary action plays only a small, albeit vital, role in lifting water in trees.\n\nThe simple answer is that the tree uses the equivalent of a siphon effect to lift the water. A siphon works because water is cohesive, IOW water sticks to water. That cohesiveness of water in a siphon tube means that as water at one end falls it is able to suck more water up from the other end. Provided that the fall is greater than the rise you are trying to overcome you can use a siphon to lift water to significant heights.\n\nA tree trunk is basically composed of masses of siphon tubes filled with water, but it doesn't have any physical 'fall' component. Instead what the tree uses is the force generated by evaporation. As water enters a leaf it is exposed to the air and allowed to evaporate. Because water is cohesive that loss of water creates a negative pressure that pulls more water into the leaf within the leaf, and that in turn creates a negative pressure that pulls water into the vessel elements of the branch and the trunk. That pressure is sufficiently high to lift water to the tops of the tallest trees.\n\nWhich is why trees use such massive quantities of water. Even a small tree will use over 100 litres of water a day and less than 1% of that will be used physiologically. The rest is simply evaporated off to draw more water up the stem. It's an incredibly wasteful process.\n\nThis is also the reason why trees in dry environments are invariably shorter than plants in wetter environments. Because the system functions like a siphon the water column in the trunk can never be allowed to break or the pressure inside will immediately drop to zero. It's like getting vapour lock in a fuel line and plants can't re-prime the line. There has to always be sufficient water in the ground to feed the negative pressure required in the column. The taller the tree the greater pressure required and hence the more water required. As a result the maximum height of tree is determined in large part by the amount of water available.
194374
Made from Redwood trees ? you are a moron ! I'd like to see a redwood totem ! How the hell would they erect it ? Move it ? Even chop it down ! before Modern saws it was impossible to fell these giants !
1152801
Leaves sense the change in moisture in the environment with the coming storm. The stomata (openings in the bottom of the leaves only to exchange carbon dioxide and oxygen, with some water vapor needed for photosynthesis within the leave) take advantage of the added water source available from the air by rolling over temporarily to take on some water. They go back to normal when the rain starts so that the openings are not exposed to the rain and drown the openings.... Also, some leaves have flat petioles, (leaf stems) that make them roll over in the wind. Have you ever seen a quaking ASPEN tree?  It shakes in the wind due to its flat stem structure of it's leaves....I can go on and on......hope this helps.....   :-)
365800
no. It is byproduct of respiration of trees.
194772
It dies.\n\nThe outer layers of bark - and just under that - are the vascular like systems that transport water and nutrients to the leaves - just like your veins. Now, imagine someone cuts all your veins and arteries up - you bleed to death. Even if the tree does not appear to "bleed" ringbarking can still kill if it stops the flow of water/nutrients from the roots and leaves and back again. \n\n... or something. Try wikipedia.
548835
Elm,hickory, beech and maple trees to name a few. At least this is the link I found.
933738
I haven't noticed my pecan tree oozing sap?  Some of my pecans have some sap-looking stuff in them, though.  I just thought those were the ones that have gone rancid.
702839
Of course they do!  they propogate themselves all the time - man just decideds to remove a lot of them in built up areas.  how on earth do you think that trees still survive. Man just plants some to try and make up for all the ones they cut down - trouble is man wants only certain trees in certain places.
310693
All spring and summer there is a lot of water to keep the trees well watered.  They use their leaves to convert sunlight into energy, but this uses up a lot of their water, so they have to keep drinking a lot from their roots.  In the winter it is too cold outside for the trees to drink because the ground is frozen and so is all of the water.  Therefore the trees go into a kind of hibernation, just like bears do.  The shed their leaves because they don't have the resources to hold onto them all winter.  \n\nThe trees also move all of the energy that they have gathered all summer from the sun and the extra water they gathered into their roots.  They take all of the nutrients from their leaves, so they change color, and they move them to their roots.  This way the tree's food is safe all winter.  Then because the trees no longer have any use for their leaves (which used to gather energy from the sun), they let them go.  That leaves all of us with leaves to make into piles and play in!
586278
Olive,Oak, Pine,Yew,Laurel,
16221
The internal pressure of the tree, when it is greater than the atmospheric pressure, causes the sap to flow out, much the same way blood flows out of a cut. If you visualize a portion of a tree trunk as being under positive pressure, a taphole is like a leak, sap moves towards the point of lowest pressure from all directions.
551926
Bark consists of phloem which conducts food material.If we peel complete bark plant will die.Bark is the outermost layer of stems and roots of woody plants such as trees. It overlays the wood and consists of three layers, the cork, the phloem, and the vascular cambium - in other words, most of the stem except for the xylem (this division may seem arbitrary, but the easiest way to split a stem parallel to its length is by pulling the bark away from the xylem). The bark of some trees is edible.The vascular cambium is the only part of a woody stem where cell division occurs. It contains undifferentiated cells that divide rapidly to produce secondary xylem to the inside and secondary phloem to the outside.Along with the xylem, the phloem is one of the two tissues inside a plant that are involved with fluid transport. The phloem transports organic molecules (particularly sugars) to wherever they are needed.BarkCork, sometimes confused with bark in colloquial speech, is the outermost layer of a woody stem, derived from the cork cambium. It serves as protection against damage, parasites and diseases, as well as dehydration and extreme temperatures. Cork can contain antiseptics like tannins. Some cork is substantially thicker, providing further insulation and giving the bark a characteristic structure, in some cases thick enough to be harvestable as cork product without killing the tree.
118930
Yes. All deciduous trees are flowering plants (Division- Spermatophyta; i.e. Seed bearing and flowering plants). So the division is the same but their families are different.There are about 450 families of the flowering plants.Deciduous trees, as the name implies, shed all their leaves once in a year.As against evergreen trees that are covered with leaves all the year round,and never leafless unless dead.