Check the Weather in Israel in January before you book your next holiday. This gives the best indication of the weather in January and includes figures for temperature, sunshine and rainfall. The Israel january weather guide shown below is for Jerusalem. 1  13Â°C max day temperature.
Xylem cells are elongated cells with lignified secondary thickening of the cell walls. Xylem cells are specialised for conduction of water, and first appeared in plants during their transition to land in the Silurian period more than 425 million years ago (see Cooksonia). The possession of xylem defines the vascular plants or Tracheophytes.
   Xylem are just made up from cell walls left from cells, making  hollow tubes. The walls of these tubes are hydrophilic, so water  attaches readily to them, helping it to climb on its way up the  plant. 1 person found this useful.   he main purpose of the xylem is to transport water and minerals up the stem, from theroots to the leaves.