Which of the following is NOT a part of Xylem tissue?
Sieve tube
Xylem is a complex permanent tissue that conducts water and minerals from the roots to the other parts of the plant. It is made of four kinds of elements: tracheids, vessels, xylem parenchyma and xylem fibres.
Tracheids and vessels are tubular, thick-walled cells that carry water, and xylem fibres give mechanical support, so all three are parts of xylem.
Sieve tubes are elements of phloem, the tissue that transports food prepared in the leaves. Phloem consists of sieve tubes, companion cells, phloem parenchyma and phloem fibres. So the sieve tube is not a part of xylem tissue.
Hence, Sieve tube.
Which feature helps pteridophytes survive better than bryophytes in places with limited moisture?
Which tissue can be found in a fern stem cross-section, but is missing in Bryophyta and Thallophyta?
The seeds of gymnosperms are considered 'naked' as:
______ vascular tissue in plants contains specialised cells called sieve tube elements, and ______ is their primary function.
Which of the following characteristics helps gymnosperms survive in cold and dry regions?
Which condition is most favorable for the growth of fungi?
A plant grows mainly in water and has a body that is not differentiated into true roots, stems, and leaves. To which group does it belong?
Which meristem is located at the base of certain plants and helps them regenerate after cutting?
Which of the following plant groups includes a green mat-like plant growing on a damp wall that lacks true roots and vascular tissues?
Which of the following best describes how plants exhibit movement due to growth?
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 ?