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.
Define Synthesis of Hormones - Vitamin C? Ascorbate is involved in the amidation, thereby conferring stability to hormones such as thyrotropin releasing hormone, adrenocorticot
Composition of oil gas is CH 4 = 25-30%; H 2 = 50-55%; CO = 10-12%; CO 2 = 3% It calorific value is 4500-5400 kcl/m 3 . It is used as laboratory gas. Oil gas is prepared b
Activators Activity of many enzymes is influenced by certain ions called as activators. Large number of enzymes such as hexokinase that require ATF are also in need of diva
Describe Paradoxical and Reverse Split S in second heart sound? Sequence of seminar valve closure reversed i.e. P, proceeds A. A reversed split is nearly always due to delayed
Define Consistency and Texture - Dysphilgia? Aspiration of liquids, including water, into the lungs can result in complications. To avoid this problem and yet fulfilling the fl
Define the Physiological Changes in Infants? Let us briefly understand some of these changes as they bear important relationship to the care and development of infants. Some o
Timing and number of doses It has been common practice to give antibiotics at the time of anesthesia induction, which results in adequate serum and tissue levels of the drugs;
What is critical photoperiod? And How can the critical photoperiod relate to flowering be experimentally determined? Critical photoperiod is the limit of the photoperiod durati
Describe Alternation of Generations? Alternation of Generations : In meiosis, four haploid daughter cells are formed from one diploid mother cell. The life cycles of sexuall
Explain Precautions for capsule staining in a culture? 1. Never heat fix the smear. This is because by heating shrinkage can occur which may create a clear zone around the cell
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