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.
What Do We Mean By Culture Media? Culture media, you would realize, is a solid or liquid preparation containing all the nutrients required by microbes for growth. So then, what
West Nile virus infection West Nile virus (WNV) is a type strain of flaviviruses and is related to Japanese encephalitis group. The virus was first isolated from a woman in the
Give the introduction to evaluation of patient clinical examination ? A careful physical examinations is a very important for assessing the cardiovascular system and after prov
Before the emergence of life of what gases was the earth's primitive atmosphere constituted? The earth's primitive atmosphere was basically produced of methane, hydrogen, ammon
GENETICS 1. The branch genetics started in 1900 after rediscovery of Mendel's work. 2. Gregor Johann Mendel is called Father of genetics. 3. The t
Define briefly about the Cereal Proteins? Cereal grains, properly ripened and dried for optimum storage stability, have protein content ranging from 6-20%. Proteins are found i
Name the t major groups of cells required in attaining specific immunity. Name the end products of aerobic and anaerobic glycolysis List two ways by which molecules of ATP are
Explain about the Integumentary Tissues? The skin, hair and nails covering and protecting the body are the intengumentary tissues. Depigmentation of hair and wrinkling of skin
Q. Explain Reproducibility of Venricular Ectopy ? Experimentally it has been shown that PVCs are frequently seen at the inception of acute ischaemia. Thus, exercise induced PVC
Agar Agar is a polysaccharide found in the cell walls of some red algae and is unusual in containing sulfated galactose monomers. Certain marine algae of the class Rhodophyceae
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