--%>
Assignment Help - homework help

Write down the cell types which form xylem

Write down the cell types which form xylem? And also write down the main aspects of those cells?

E

Expert

Verified

The main cells of xylem are tracheids and vessel elements (these only in the angiosperms). The tracheids and vessel elements are dead cells which have lost their cytoplasm and only their cell wall impregnated with the lignin (an impermeable biopolymer) remained. The tracheids form tubes which communicate with neighboring tubes by the pores; the vessel elements don’t present pores however instead they communicate with successive vessel element by the perforations in their extremities.

   Related Questions in Biology

  • Q : How is gingivitis cured How is

    How is gingivitis cured?

    		•
  • Q : Requirement for accuracy-Market

    Requirement for accuracy: The accuracy condition of the system decides the need level of detail, quality and feature of the input data, and superiority of the system logic. The system should be so designed that it provides accuracy that is equivalent

    		•
  • Q : Explain Margin Improvement Margin

    Margin Improvement: Margins in the industry kept beneath pressure, even previous to the economic downturn for the industry as entire, returns on capital have continued beneath the cost of capital. Previous to the falls in the second half of 2008, the

    		•
  • Q : Lactose tolerant individuals Why can

    Why can individuals from only some human populations tolerate milk as adults? In your own words, explain in detail the genetic changes that allow for milk tolerance in adult humans.)

    		•
  • Q : Division of meiotic-separation of

    In which division of meiotic does the separation of homologous take place? What are the ploidies of generated cells subsequent to the ending of that process?

    		•
  • Q : Activation of main gastric digestive

    Besides being basic for the activation of main gastric digestive enzyme how does HCl as well directly contribute in digestion?

    		•
  • Q : Constituent elements of the blood Name

    Name the constituent elements of the blood?

    		•
  • Q : Oxy-haemoglobin and haemoglobin How

    How oxy-haemoglobin and haemoglobin are different from each other? Where we can find the higher concentration of oxy-haemoglobin, within the peripheral tissues or within lungs?

    		•
  • Q : Contraindications of contraceptive pills

    Explain the common contraindications of contraceptive pills?

    		•
  • Q : Symptoms of thalassemia Briefly

    Briefly describe the symptoms of thalassemia?

    		•