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In spite of the fact that their cytoplasm is actively involved in the conduction of food materials, sieve-tube members do not have nuclei at maturity.
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Do sieve cells have nucleus?
Seive cells have a nucleus.Seive tube elements do not have a nucleus.
What is living but non-nucleated a sieve tube bcompanion cell cphloem fiber dphloem parenchyma?
sieve tube.
What is the adaptation of phloem?
Sieve tube elements contain little cytoplasm and no nucleusHas cross walls with pores to allow flow of sapCompanion cells on the side that have mitochondria to produce ATP for active processesCompanion cell and sieve tube element are linked through many plasmodesmata
Are pollen grains haploid or diploid if they have two nuclei the generative and the tube nuclei?
Pollen grains with generative and tube nuclei have two haploid nuclei.
Do all eukaryotes possess mitochondria?
Almost every eukaryotic cell have them.But mammalian red blood cells,sieve tube elements lack them
How is sieve tube different from companion cells?
The sieve tube elements are specialized elongated cells in the phloem that connect end to end forming a tube. The main function of this tube is to transport nutrition in the form of carbohydrates. Sieve cells have no nucleus, ribosomes and cytoplasm, meanin they cannot carry out primary metabolic activities. The companion cells, which are closely associated with the sieve tube elements, carry out the their metabolic functions.
What are the sugar-transporting cells in angiosperms?
sieve-tube elements
What are sieve cells?
In plant anatomy, sieve tube elements, are a specialized type of elongated cell in the phloem tissue of flowering plants. The ends of these cells connect with other sieve tube members, making up the sieve tube, whose main function is transport of carbohydrates in the plant.
Do sieve cells have nucleus?
Seive cells have a nucleus.Seive tube elements do not have a nucleus.
What is the sugar-transporting cells in angiosperms?
Tubes in the steam.
The cells that function with the sieve tubes are the?
Cells containing sieve plates are called sieve tube members, a component of the phloem, which carries sugars produced in the leaves to various parts of the plant. They are characteristic of angiosperms (flowering plants) while gymnosperms (cone-bearing plants) have only sieve cells. Sieve cells and sieve tube members are collectively referred to as sieve elements.
What cells have no mitochondria?
prokariyotes do not have.Mamalian RBC,sieve tube elements and some protists lack them
What are sieve-tube cells?
In plant anatomy, sieve tube elements, are a specialized type of elongated cell in the phloem tissue of flowering plants. The ends of these cells connect with other sieve tube members, making up the sieve tube, whose main function is transport of carbohydrates in the plant.
How is a sieve tube adapted to its job?
The end walls of the sieve tubes are perforated and these perforated end walls are called sieve plates. Pores in the sieve plates offer less resistance to flow of liquid.Little cytoplasm in cells = only forms a thin layer lining the inside of the wall of the cell.cells of the sieve tube are living,thus facilitating translocation.sieve plates allow the phloem to seal itself rapidly if it is cut,since it can clot due to callose as a carbohydratesieve plates act as supporting elements thus preventing the phloem from collapsing. .
What are cells that do not have a nuclei or mitochondria called?
They are prokariyotic cells.Also erithrocytes and seive tube elements do not have.
What is living but non-nucleated a sieve tube bcompanion cell cphloem fiber dphloem parenchyma?
sieve tube.
What is the adaptation of phloem?
Sieve tube elements contain little cytoplasm and no nucleusHas cross walls with pores to allow flow of sapCompanion cells on the side that have mitochondria to produce ATP for active processesCompanion cell and sieve tube element are linked through many plasmodesmata
