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!
Solar Tracking - Nastic and Epinastic Responses
Many plants such as sun flowers are capable of solar tracking in which the flat blade of leaves or inflorescence will remain at right angles to the sun throughout the day, maximizing the light harvested by the leaf. Darwin studied the phenomenon first. This movement is presently thought to be controlled through a mechanism of maintenance of turgidity levels in petiole (pulvinus). Later studies also indicate a role for active pumping of K' ions across the membrane.
Figure: Solar tracking in a plant with cup-shaped leaves such as some members of the Mal- vacea family (e.g. Malva or Lavatera). The leaves receive directional signals from the sun and swivel around to face it as pulvinus cells at the base of the blade gain or lose water. (a and b) The leaves track the sun during the day, much as a radio telescope tracks a satellite (c) An hour or two after sunset, the blades arc nearly horizontal in the "relaxed" position they maintain during most of the night (d) About an hour before sunrise, the blades face the point on the eastern horizon where the sun came up the day before.
What are the effects of acid precipitation on ecosystems?
(a) Anti-malarial drugs kill the parasites in the blood but they do not cure the disease.Why is this? (b) Why was the use of DDT insecticide not successful in eradicating mal
Dissociation and double dissociations Neuropsychologists typically try to design studies that provide evidence of the differential performance of brain damaged and control subj
Explain about G-protein A. When an agonist binds to the binding site of a G-protein-coupled receptor (GPCR), this leads to GTP displacing a GDP bound to the alpha subunit of
What are the types of leukocytes and how are they classified into granulocytes and agranulocytes? The types of leukocytes are monocytes, lymphocytes, neutrophils, eosinophils
Explain Cancer and Inhibition of Tumorigenesis? Polyphenols appear to play a preventive role although the molecular mechanisms of action and applicability to human cancer preve
Slow walking or Crawling This type of locomotion is seen while the animal moves on the substratum. It involves a metachronal rhythm of action in the parapodia. Each fifth or
regenerstion in invertebrates
Define Trace elements for school children and adolescents? Iodine requirements peak in adolescence. Consumption of iodized salt should be ensured. Adequacy of zinc for growth i
Social Determinants of Health - Unemployment That unemployment gives rise to social insecurity and psychological stress is well recognised. Fears and uncertainties are known t
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