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Where is the vascular tissue located in the root?
In the stele inside endodermis
Why don't some insects that are parasitic on plants obtain their food from xylem?
The xylem and phloem tissue are collectively known as vascular tissue. The main responsibility of vascular tissue is to transport water and food, as well as other nutrients, throughout the body. The xylem carries water from the roots up to the leaves. The leaves perform photosynthesis, and the sugars synthesized is then moved throughout the body through the phloem. The reason why insects feed off these tissues is to gain access to the foods and water inside.
How do vascular plants' xylem and phloem compare to an animals' arteries and veins?
Xylem, phloem, arteries and veins are all specialized transport systems that serve a unique but similar function in their respective organisms. Arteries and veins make up the circulatory system of many animals and are the primary mechanism for transporting nutrients and vital compounds throughout a living organism. The arteries are specialized in the transport of oxygenated blood away from the heart while veins return blood without their oxygen back to the heart to restore the cycle. Along the way, various compounds are dropped off and picked up at various cells. While arteries and veins are an all encompassing system for transporting anything, xylem and phloem are even more specialized to only work in transporting certain materials. Phloem is specialized in the transport of nutrients, particularly sugar, throughout a vascular plant, while xylem is almost exclusively for water. Wheres arteries and veins require the pumping of a heart to flow, xylem and phloem depend on basic physical principles. Phloem utilizes the change in concentration between sources of nutrients and sites in need of nutrients to literally draw the nutrients where they are needed. Likewise, xylem depends on osmosis and a difference in pressure at the roots and the leaves to draw water up and through the plant.
What does xylem do to a vein leaf?
Xylem is a type of vascular tissue in plants. There are both xylem and phloem that operate to move material thru the plant.the Xylem are like tubes that carry water and minerals up from the roots of the plant.the Phloem on the other hand are tubes that distribute sugars, amino acids and other organic stuffs.but specifically in the LEAF (from wiki:)"Transpirational pull: the most important cause of xylem sap flow is the evaporation of water from the surfaces of mesophyll cells to the atmosphere. This transpiration causes millions of minute menisci to form in the mesophyll cell wall. The resulting surface tension causes a negative pressure or tension in the xylem that pulls the water from the roots and soil."...meaning basically: when the water evaporates off the leaf (mesophyll layer) it causes a lower pressure in the xylem and so that pressure actually "pulls" the water from the roots to the surface. so basically it shows one way in which the xylem tube functions: by transpirational (=>evaporative) pull.
Is a tree limb breaking a chemical or physical change?
It is a physical change: the wood (mostly cellulose) is not changed by the breaking. However, the living cells (if any) in the branch will begin to change chemically when exposed to the air and cut off from the xylem and phloem in the rest of the tree. Eventually the cells will die and the wood will rot (chemical changes).
What are the five tissue layers of a tree?
The five layers of a tree are: 1. The first layer is the bark. The bark protects the other layers. 2. If you rip off the bark of a tree, you will find the phloem layer. 3. After the phloem layer is the vascular cambium, which allows the tree to make a new bark after spring comes. This also includes the xylem tubes. 4. The sapwood layer stores the sugar the trees leaves make. Also, you get maple syrup from the sapwood of a maple tree. 5. The heartwood layer is dead xylem the tree had made past springs. The heartwood layer makes the tree steady, so the tree wont topple over too easily.
Which structure provides support from the plant and contains vascular tissue?
The stem. Leaves do branch off the stem; however, it is the veins of the leaf that give the leaves their support. Just like the stem, the veins are composed of xylem and phloem (vascular tissue).
How would you differentiate between the roots of monocot and dicot plants?
The roots of most dicots originate from the radicle. They appear in an X shape - with the xylem in the centre, and phloem in the gaps. By contrast, the radicle of monocots aborts, and the roots appear to originate almost at random from nodes in the stem. The phloem and xylem alternate - forming a circle.
What are the harmful effect of lichen?
Epiphytic lichens can have harmful effects on trees on which they grow. They can tear off areas of phloem and xylem and disperse toward the vessels. From there, they can reach the leaves, block the electron transport and cause other damage. For more information, visit http://canopy.evergreen.edu/bcd/Content/Citations/Citation.aspx?refid=8568.
Do you have to pay a personal loan off if the person dies?
The estate of the person who dies is responsible for paying off the debt.
What do emerald ash borers do to ash trees?
Emerald ash borer is a wood boring insect that feeds on the xylem and phloem of ash trees when it is in its larval stage. By feeding on these tissues, the larvae cut off valuable water and nutrient supplies to parts of the tree and cause die back. As the infestation progresses more of the tree dies back and, eventually the tree dies. It is really only the larval stage that kills trees. It is important to note that it takes up to five years for the tree to die completely, so early detection is difficult. The best course of action if you are concerned for your tree is to treat it preventatively. There are many products available to do so, some of which you can do yourself.
How a chicken dies?
its head falls off
