Though xylem and phloem are both a part of the transportation system of plants, they transport different things. Xylem transports water and dissolved minerals. Phloem transports sugars throughout the plant.Continue Reading
Xylem conducts fluids from the roots of the plant to the top of the plant. Xylem tissues are connected in a straight line to facilitate the movement of the water and minerals. Old xylem tissue dies and new xylem tissue is produced each year. This is evidenced by the growth rings that are found in trees when they are cut down. Phloem does not die each year. It is spread throughout the plant and works to take the products of photosynthesis to the necessary locations for plant growth.
Both xylem and phloem are arranged close to each other in vascular bundles. The specific arrangement of the xylem and phloem varies between different plant types. In a collateral arrangement, the xylem and phloem are beside each other. In a bicollateral arrangement, the xylem is located between two columns of phloem. Amphivasal arrangements result in the phloem being surrounded by xylem, while amphicribral arrangements are exactly the opposite, with the xylem being surrounded by the phloem. Both xylem and phloem originate from cells in the apical meristem.Learn more about Homework Help
How Stuff Works explains that water reaches the leaves of plants through the xylem vessels, and it escapes through small holes in the leaf known as stomata. The process by which the water moves from the capillaries to the xylem vessels and into the stomata is called transpiration. Plants absorb water through their roots, which contain capillaries. The capillaries are responsible for sending water through the xylem vessels.Full Answer >
Water is transported inside plants by tube-like cells called xylem. The process relies on both osmotic pressure and capillary action.Full Answer >
Easy projects for the 100th day of school can involve collecting or organizing things in groups of 100. For example, students can collect 100 items that have to do with topics discussed in class, such as 100 math problems, 100 books about a certain subject or 100 cool science facts.Full Answer >
Some ideas for middle school science projects include finding out what plants grow in which soil pH level and discovering the electrical conductivity of certain soil types, says Live Science. Other science projects include discovering natural water filters and the most effective plastic wrap to prevent evaporation, according to About.com.Full Answer >