The first formed primary xylem elements are called ___________.
Protoxylem
Primary xylem differentiates from the procambium in two stages. The elements formed first are called protoxylem; they have narrow vessels/tracheids with annular or spiral lignin thickenings and mature while surrounding tissues are still elongating.
Metaxylem is the later-formed primary xylem (wider, with scalariform/reticulate/pitted thickenings). Xylem fibres and xylem parenchyma are supportive/storage components, not conducting elements classified by time of formation.
Similar Questions
Which of the following has the highest protein content per gram?
______ part of xylem tissue in plants stores food.
Which of the following plant hormones regulates growth, particularly by stimulating cell elongation in stems?
In leaves transpiration takes place through ________.
The development of a fruit without fertilization is called ______.
_______ is the pattern of veins in the blade of a leaf.
Among plants, three different genera Solanum, Petunia and Datura are placed in which family?
Photosynthesis takes place in the presence of chlorophyll and _________.
Sexual reproduction in Algae that takes place through fusion of two similar size gametes is called?
Bryophytes are also called _________ of the plant kingdom.
Important Questions from Botany
Which of the following is a type of nutrition?
I. Heterotrophic
II. Autotrophic
Part of N 2cycle that is opposed to N 2fixation is:
Which among the following is the reproductive part of a plant?
Fibres (Adventitious) roots are found in :
In which Part of the flower does Meiosis take place ?
