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.
1 Water conducting cells of xylem also have a support function in plants but unlike collenchyma cells, they have a hardening agent and are much more rigid. 2  Sieve Tube Members. 3  Sieve tube members of phloem conduct organic nutrients such as sugar throughout the plant.