Photoperiodism Essays - Plant Physiology, Botany, Plant Morphology

Photoperiodism Plants and animals in the temperate zones respond in different ways to the amount of daylight in 24-hour periods. This response to day length is called photo periodism. It controls many activities, among them is the flowering of plants. The ability to respond to day length is linked to an inner, light- sensitive circadian rhythm. In the temperate zones, day lengths during the natural 24-hour cycle vary with the seasons. In winter and spring, the period of light lengthens; in summer and autumn, it shortens. Plants in these zones undergo alternate 12-hour phases of light sensitivity. During one 12-hour phase, decreasing exposure to light induces a short-day reaction. For example, deciduous trees under the influence of the shorter days of fall drop their leaves. During the other 12-hour phase, more exposure to light creates a long-day reaction. Deciduous trees grow leaves again during the lengthening days of spring. This indicates that through their sensitivity to changes in the duration of light, plants can measure day length to determine the season and the time spans within a season. Florists can often manipulate greenhouse plants into producing blossoms out of season by exposing them to periods of artificial light. Some scientists are not certain that the biological clock of any organism is completely endogenous. They think that even under the most constant of laboratory conditions living things are aware of the Earth's rotation and that this has an effect on the wheelof their clocks. However, many scientists believe that such factors are not essential to the functioning of biological clocks.

Word Choice There, Their and Theyre - Proofeds Writing Tips

Word Choice There, Their and Theyre - Proofeds Writing Tips Word Choice: There, Their and Theyre When writing, its easy to confuse the words there, their and theyre since they sound similar when spoken. Moreover, these words will not always be picked up by your spellchecker if used wrongly, so its easy for errors to creep into your work. How, then, can you make sure youve used them correctly in your work? Read on to find out! There (Location or Position) There is used to indicate the place of something. We can thus use it to refer to something in our immediate vicinity: Not the red car. I mean the green car over there. Or to refer to a place previously mentioned in the conversation: India? No, Ive never been there. It can also be used with the verb are to assert the existence of something: There are several cinemas in New York. Or to ask a question about whether something is present or existing: Is there a burger bar somewhere around here? Their (Possession) Their is a pronoun used to indicate third-person, plural possession. This means that it is used when describing something that belongs to a group of things or people: This is their ball; youd better give it back. You know its winter when the trees lose their leaves. Remember that the word theirs is a pronoun and used in the same way as his or hers. You do not need to add an apostrophe to show possession! Theyre (They Are) The apostrophe in theyre indicates that this is a contraction of they are: Theyre going to win the game. I think theyre coming over tonight. Its worth noting that contractions like theyre are often considered informal, so you should make sure to write they are in academic or professional documents. To check your writing for mistakes like these, why not send it to the professionals at Proofed?

An e-commerce strategy and architecture Essay Example | Topics and Well Written Essays - 4250 words

An e-commerce strategy and architecture - Essay Example According to the research findings it can therefore be said that the Secure-Car Business deals in such systems along with other accessories which can help secure our vehicles from illegal intrusion. Up till now, this firm has been running its business using tradition business management structure. For instance, it has a store where people come to shop. They shop for the desired product and pay instantly. The firm has adopted a paper based approach to keep the record of its products and services. In this IT based era where people want to shop by remaining at their homes, Secure-Car has been using a traditional business approach. Once the manager/owner of the firm was using the Internet to locate information on a specific device, he was shocked to see the support of the Internet for delivering the required information in a few seconds. Manager/owner of the firm decided to implement an e-commerce platform for their business. The basic purpose of implementing this e-commerce business is to promote their business and let the other people shop by sitting at their homes. This e-commerce web site will allow the customers to place an order online by filling an online form. In this scenario, the order details will be received by the Secure-Car firm and they will deliver the product to their customer. Though, it is a proposed scenario and for the actual implementation of this idea, the manager/owner of the firm must be familiar with the terms associated with e-commerce. 2- Introduction to E-commerce Concepts A lot of the ways business organizations and individuals perform their daily tasks and continue to exist in the twenty-first century are measured with the huge web of electronic networks that is normally acknowledged as the Internet (Turban, Leidner, McLean, & Wetherbe, 2005). In addition, the across-the-board existence of the Internet for performing transactions between sellers and buyers is the fundamental motive behind the development of electronic commerce or simp ly (e-commerce). According to (Laudon & Laudon, 1999, p. 25; Stair & Reynolds, 2003, p. 19), â€Å"electronic commerce is the process of selling and purchasing services and goods and products is carried out electronically by means of computerized business transactions over the Internet, networks, and other digital technologies†. In addition, e-commerce also encompasses the operations behind those business transactions, such as business marketing advertising, offering customer support, and processing payment. Additionally, by replacing old and rigid paper-based and manual techniques with electronic processes, and with advanced information flows in up to date and active manners, e-commerce does not only offer the business organizations a capability to accelerate the process of ordering, delivery, and payment for products, services and goods but also minimizes the operating and inventory expenditures of the organizations (Laudon & Laudon, 1999, p. 25). Moreover, the World Wide W eb (WWW) has turned into a common platform for performing e-commerce, building and implementing latest tools and technologies for the organizations to communicate with each other and their customers.