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.
Adrenal glands There are two adrenal glands one each on the top of each kidney. Adrenal gland has two parts, the outer cortex and inner medulla. Both cortex and medull
T hese are some important uses of biodiversity. 1. Source of food, medicines and drugs: (a) Wheat, rice and maize are three carbohydrate rich crops and contribute
Define Class Turbellaria - Flatworms ? Members of these two Classes are known as the flukes. Flukes are parasitic flatworms that inhabit tropical areas like Southeast Asia and
how does it work
Explain the Anaesthesia and Analgesia Most implant surgery can be carried out under local anaesthesia, although some patients will require sedation or general anaesthesia. The
#question.what are the reason that arthropodans are abundant in nature.
Define the Enumeration of Food Microbiota? Quality of food depends on its physical, chemical, microbiological and sensory quality. The examination of food for the type and numb
List the goals of targeting blood pressure in diabetics. Goals of targeting blood pressure in diabetics are: Patients with diabetes should be treated to a systolic blood pr
Which term is used to describe organisms that live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to greatest ocean depths? a)
Accident Proneness The close observation of accident causation theory brings out this fact that most accidents can be traced to error on the part of a number of individual em
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