#xylem tissue

[hebasoffar]

Each organism ingests what it needs of various substances by different means , There is no need for a specialized transport tissues in the primitive plants ( like algae ) , as the raw material ( CO2 , water and mineral salts ) and the products of photosynthesis move together from one cell to another by diffusion and active transport .

[hebasoffar]

The plant makes transpiration, whereas the water vapour passes from the exposed parts of the plant to the surrounding air and some of it condenses and forms drops, if you add the condensed liquid to anhydrous white copper sulphate, it becomes blue, confirming that the liquid is water. Excretion in plants Water is absorbed by roots, Water ascends through the xylem tissue

[hebasoffar]

The plant makes transpiration, whereas the water vapour passes from the exposed parts of the plant to the surrounding air and some of it condenses and forms drops, if you add the condensed liquid to anhydrous white copper sulphate, it becomes blue, confirming that the liquid is water. Excretion in plants Water is absorbed by roots, Water ascends through the xylem tissue

[science-junkie]

Good news for all survivalists!

 Need a water filter? Peel a tree branch

If you've run out of drinking water during a lakeside camping trip, there’s a simple solution: Break off a branch from the nearest pine tree, peel away the bark, and slowly pour lake water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water.

In fact, an MIT team has discovered that this low-tech filtration system can produce up to four liters of drinking water a day — enough to quench the thirst of a typical person.

In a paper published this week in the journal PLoS ONE, the researchers demonstrate that a small piece of sapwood can filter out more than 99 percent of the bacteria E. coli from water. They say the size of the pores in sapwood — which contains xylem tissue evolved to transport sap up the length of a tree — also allows water through while blocking most types of bacteria.

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