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How do plants solve the problem of transporting substances throughout their tissues?
In bryophytes the substance transport is completed by diffusion. In tracheophytes (pteridophytes, gymnosperms and angiosperms) there are specialized conductive vessels, the xylem that carries water and mineral salts and the phloem that conduct organic material (sugar).
Plant Physiology - Image Diversity: xylem
THEORIES TO EXPLAIN FINE STRUCTURE OF CHROMOSOME (1 ) Multistranded theory Steffenson 1959 - each chromosome composed of two chromatids (Half Chromosome) and each chromat
OBJECTIVES : After reading surgery, you will be able to: 1 understand the fundamental of closed and open heart surgery and recent developments in off pump surgery; 2 in
Q. What are the factors that for influencing photosynthesis also interfere with the gross primary productivity? Mostly light and water, but as well mineral salts, carbon dioxid
In which of the following functional groups ionization is stabilized by resonance? Select one: a. Carboxyl b. Hydroxyl c. Amine d. Aldehyde e. All of the above
what is proteins?properties of protein
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Hypothalamus functions are generally aimed at maintaining A region in the brain beneath the thalamus; consists of number of aggregations of nerve cells and controls a variety of a
Suppose the restriction endonuclease HindIII cuts a6.0 kb linear piece of DNA into two fragments; an 800 bp fragment and a 5200 bp fragment..... Question: Suppose restriction
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Protozoans - Body Form The protozoan body is usually bound only by the cell membrane called plasmalemma. In some protozoans such as in ciliates the rigidity and the flexibili
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