0
Seive cells have a nucleus.Seive tube elements do not have a nucleus.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
WHAT ARE THE ADAPTATIONS OF THE PHLOEM?
Phloem cells do not have a nucleus, and they have very few vacuoles. They act much like a sieve.
How do water- conducting cells differ from cells that transport food?
Xylem (water-conducting cells) are dead (no cytoplasm), and form long tubes called vessels (no end walls) The walls are thickened with ligninPhloem (food transport cells) are living (have cytoplasm) There are two cell types - sieve tubes which conduct the food - they have end walls with perforations (sieve plates) and have no nucleus and companion cells - they don't conduct food but have a nucleus and they support the sieve tubes
The cell theory states that all cells have a nucleus?
"All" is a complicated word in biology as there are almost always exceptions to every rule. Not all cells have a nucleus. Red blood cells in humans don't, though they do in some other animals such as birds. Sieve tube element cells in plants don't either. Prokaryotes, which means 'primitive nucleus' such as bacterial cells technically don't have a proper nucleus as in having a membrane sheltering their genetic material.
Do all cell almost have nucleus?
They don't. The nucleus is only present in eukaryotic cells. (Animal Cell) Prokaryotic cells don't have nuclei. (Bacteria)
In many cells the structure that controls the cells activitie is the?
Nucleus
Which of the plant cells have no nucleus?
Parenchyma, companion, sieve tube, & xylem cells have no nucleus. But, those are only the cells with out a nucleus that are fuctional.
What is a name for a cell without a nucleus?
Prokaryotic cells . RBC of mammals and Sieve tube cells of plants .
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 cells that do have a nuclei?
Nucleus is an imp component of cell essential for survival . An organised nucleus appears in eukaryotes(except mammalian rbc and sieve tube cells of phloem) for the first time .Prokaryotes have an unorganised nucleus....
WHAT ARE THE ADAPTATIONS OF THE PHLOEM?
Phloem cells do not have a nucleus, and they have very few vacuoles. They act much like a sieve.
How do water- conducting cells differ from cells that transport food?
Xylem (water-conducting cells) are dead (no cytoplasm), and form long tubes called vessels (no end walls) The walls are thickened with ligninPhloem (food transport cells) are living (have cytoplasm) There are two cell types - sieve tubes which conduct the food - they have end walls with perforations (sieve plates) and have no nucleus and companion cells - they don't conduct food but have a nucleus and they support the sieve tubes
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.
Which cell is the nucleolus located?
Do you mean nucleolus? If so, all Eukaryotic cells like plant and animal cells have a nucleolus. but most bacterial cells such as Prokaryotes have a nucleoid which is different from a nucleus or nucleolus.
The cell theory states that all cells have a nucleus?
"All" is a complicated word in biology as there are almost always exceptions to every rule. Not all cells have a nucleus. Red blood cells in humans don't, though they do in some other animals such as birds. Sieve tube element cells in plants don't either. Prokaryotes, which means 'primitive nucleus' such as bacterial cells technically don't have a proper nucleus as in having a membrane sheltering their genetic material.
Do all cell almost have nucleus?
They don't. The nucleus is only present in eukaryotic cells. (Animal Cell) Prokaryotic cells don't have nuclei. (Bacteria)
What is a sieve phloem?
The cells having sieve like perforations in their cell walls present in phloem are the sieve tubes of the phloem.
Dod all plant cell contain nucleus?
no.companion cell and sieve tube cell of plant has no nucleus
