Are xylem and phloem made of the living cells
Are xylem and phloem made of the living cells?
Expert
The cells which constitute xylem ducts are dead cells killed by the lignin deposition. The cells of phloem are the living cells.
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Name the five classes of vertebrates? To which of such do human beings belong?
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How Passive immunity is categorized?
How can the presence, function and localization of muscular tissue in beings of phylum Annelida be elucidated?
Write down the specialized conductive tissues of plants?
Do sponges contain circulatory, nervous and excretory systems? Answer: Sponges do not contain a nervous system neither circulatory nor excretory system.
Is the stage when insect larva is in a cocoon a stage of the total biological inactivity?
Of what units are nucleic acids composed of? Describe the chemical entities which include that unit?
Why endocrine system considered integrative systems of body? What is the other physiological system which also has this function?
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