Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Necessity of Transport in Phloem
Leaves produce photoassimilates and support various tissues including roots. The excess photoassimilates and metabolites stored in specialised tissues produce fruits and seeds which germinate and regenerate the plant in the appropriate season. The leaves at the canopy of a tree are at a distance from roots. This can vary from a few millimetres to more than 100 meters. All in all we need an extensive transport system to carry the products of photosynthesis and nitrogen metabolism over medium and long distances. Diffusion is too slow a process to achieve this task over such large distances; what is required is a convective flow in the specialised vascular system so that the photosynthates reach all the needy tissues. The transport system has to be as extensive and ramified as the arterial and venous network in an animal body.
However, plants are devoid of a specialised pump such as heart meant for blood circulation. Though we have not yet fully understood how plants achieve this goal, they do carry out this exceedingly difficult task without a heart. Leaves manage to feed the tissues over vast expanses of the plant body with photosynthates necessary to fulfil their requirement.
Define Hydroxybenzoic acid and Hydroxycinnamic acid? Hydroxybenzoic acid: e.g. ellagic and gallic acids, which are hydrolyzable tannins, present in berries and nuts. Hydroxy
TECHNIQUE OF ASSESSMENT OF GROWTH AND DEVELOPMENT Measurement of physical growth in children is a key element in evaluation of the health status of children. Physical grow
Giant chromosomes
Long Distance Transport Once in the xylem vessels, the transport of the mineral elements from the root to the shoot is driven by the gradient of hydrostatic pressure (root pre
Eczema and Dermatitis: Eczema and Dermatitis are a common problem all over the world. Their incidence is 2-3 per cent of all medical problems seen in practice (about 30 per
Countercurrent flow is the arrangement by which fish get oxygen from the water which flows by the help of their gills. The water flows across the respiratory surface of the gill i
Which type Ribosome occurs exclusivley in Mitocondria?
Assume an experimental target that is to make vast amounts of a particular DNA fragment in pure form from a combination of DNA fragments. Whereas the DNA fragments can be introduc
Explain the Applications of vitamin B 12 Cyanocobalamin is used in the preparation of liquid and dry drug formulations of all kinds. In the animal feed industry, usually co
Are protozoans under the Kingdom Animalia?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd