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!
Photoperiodism
Activity like breeding and migration in animals; flowering, seed germination in plants are regulated by the length of daily period of light and darkness. This behavioural phenomenon is known as photoperiodism. For example, plants such as radish, potatoes and spinach bloom when the light duration is more than 12 hours/day. Such plants are called long day plants. Cereal, tobacco, dahelia and many other plants bloom when light duration is less than 12 hrs/day. These are called short day plants. Such responses show that plants have built-in mechanisms for measuring the duration of illumination and darkness and hence flower in a specific seasons.
Similar photoperiodic responses are observed in animals. These may be diurnal, lunar or annual. Reproduction and migration in birds are such annual photoperiodic responses. From such responses it seems that distribution of some plants and animals may be restricted because the necessary photoperiodic stimulus is available only at certain latitudes.
Q. History of plant classification? Before Darwin's theory of evolution and publication of his epoch making work 'Origin of Species' in 1959 no outstanding basis for the classi
DIFFERENCE BETWEEN PLANTS AND ANIMALS - S . N o . C h a ra c ter P l an ts A n i m al s 1 Nutrition
What do we mean by fixation? Fixation is the process of preserving internal and external structures of microorganisms. It leads to the killing of microbial cells and their fir
Y-Linked traits in humans Any gene that occurs exclusively on the Y chromosome is said to be holandric and it is not expressed in females. Such a Y-linked gene normally occurs
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Alkaline Phosphatases use water as a second substrate. Why do we still treat their kinetics as if they were for a single-substrate reaction?
Q. What do you mean by eutrophication? The Eutrophication is the process of excessive increasing of nutrients, like nitrate and phosphate in water due to direct deposit of non
Mollusks
What grade did you get in biology?
Q. What do you mean by Cytotaxonomu and biosustematics? Towards the end of the 19 th century and in the early years of the 20th century, botanists were faced with a problem of
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