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.
As a complex tissue, it is composed of four cell types: vessel elements, tracheids, parenchyma cells and fibers. Vessel elements, non-living, barrel-like cells, and tracheids, non-living, tapered cells, are the actual water-conducting cells of xylem tissue. The parenchyma cells function in storage and the fibers function in support. Phloem transports the carbohydrate products (sugars) of photosynthesis throughout the plant.