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.
Hans spemann theory
Q. Which are the beings that constitute the kingdom Monera? The kingdom Monera is the kingdom of the prokaryotes, archaebacteria and composed of bacteria. Q. Which are the
What is Carbohydrates? Carbohydrates : Carbohydrates function mainly as immediate sources of energy, stored energy such as starch, and structural components of cells. Carbohyd
Mosaic Endosperm - Variants of Endosperm In some plants patches of two different colors appear in the tissues of the endosperm providing a mosaic design. In maize, red and whi
Titration of inverted honey solution It involves the titration of the inverted honey solution. Carry out the titration in the following manner. 1) In a conical flask take 5
Explain the senses taste and smell ? The pigmented cone cells of the retina transmit information to bipolar nerve cells, then to ganglion cells, and on to the optic nerve and t
How does a population differ from a community? A population having of all members of a single species that live in an area, while a community consists of all organisms of any s
two larva forms of sponge
Explain the Functionality of Hot Air Oven? Hot air oven sterilizes the object by hot dry air. It kills the microorganisms by oxidizing cellular constituents. Dry Heat is less e
The extracellular surface of the plasma membrane is frequently covered with a protective coat of carbohydrate. A Sugar residue of this carbohydrate coat can be
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