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.
The xylem also provides a secondary function of structural support for the plant. The xylem acts like a spine that helps keep the plant upright. The texture of a stem often varies based on the amount of xylem tissue found in the plant. For example, woody tree stems have a large amount of hard xylem tissue. While, herbaceous stems, like flowers, have a small amount of xylem tissue.