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.
There are two types of cells that make up the xylem: tracheids and vessel elements. Both of these cell types are dead when they are used in the xylem. Using dead cells, which donât have organelles filling them up, allows more capacity for transporting water.Tracheids are long, narrow cells whose ends overlap.ylem and phloem make up the vascular tissue. The vascular tissue is arranged in bundles, and is easy to see in a cross-section of a stem: Another important tissue is the dermal tissue, which is the outer protective layer. Plants donât have skin exactly, but they do have an epidermis.