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Transport in Phloem
The basic necessities of plants, water, are taken up by the roots. Another purpose served by the roots is to absorb water soluble mineral nutrients from the soil. Mineral nutrients move together with water in long distance pathways provided by the vascular system to reach the entire plant. Roots cannot feed themselves in the darkness of soil.
Several other tissues in the plant body also lack photosynthetic apparatus completely or possess it partly in the sense that they cannot manufacture enough food required to support their life processes. Leaves on the other hand rely on roots for water and minerals but manufacture more food than they actually need. Hence, leaves serve as the source of food for other tissues which may store excess of it so that it can be used by plant for the perpetuation and spread of species.
What is pleiotropy? Pleiotropy (or pliotropy) is the occurrence in which a single gene conditions several dissimilar phenotypical traits. Some phenotypical traits might be s
Two typical characters of the Hemichordata that can be observed and used to identify them are: i) Soft, worm-like or short unsegmented body. ii) Body is divided into a (i) pr
DNA replication in eukaryotes is much more complex than in prokaryotes while there are various same aspects. The Eukaryotic cells can only initiate DNA replication at a particular
how respiration takes place in mammls and reptiles
Osmosis and transpiration both play a part in the movement of water through a plant. Which of these two processes makes the greater contribution to the movement of water up the t
which bone of rabbit is like wing?
Most dental offices have a designated area for instrument reprocessing that is separate from the dental treatment room. This is ideal, since cleaning, sterilizing and storing instr
State two procedures which are used to reduce the chances of a kidney graft being rejected Drugs are used to suppress the patient's immune response to foreign tissue. The dono
Q. What and how many are the pulmonary veins? The pulmonary veins are part of the pulmonary circulation they are vessels that carry oxygen-rich (arterial) blood from the lungs
waht is meant bu warren.?
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