Plants have developed responses called tropisms. A tropism is a growth in response to a stimulus; so light and water in the plant’s case. There are different types of tropisms: Positive tropisms are when growth is towards the stimulus - so the plant growing towards the light to maximise the stimulus for photosynthesis. Negative tropisms are when growth is away from the stimulus - so roots growing away from the light, and deeper into the soil, so there is less chance of them being dried out. These are both phototropisms: growth in response to light. There are also geotropisms which is growth in response to gravity. The stem undergoes negative geotropism, because it goes against gravity, and grows upwards towards the light. Whereas roots undergo positive geotropism, because they grow in the same direction as gravity - downwards. So unsurprisingly, plants grow in response to light and water, and grow towards or away from light (Phototropism) and with or against gravity (Geotropism). But something must control this growth. Just like humans, plants have growth hormones. We will look at these plant hormones in our video called ‘plant hormones: auxins and gibberellins’ and we will see how they are used in weed killers, fruit ripening and more. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Friend us: http://www.facebook.com/fuseschool Click here to see more videos: https://alugha.com/FuseSchool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC (View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org
Interest is the amount charged by a lender to a borrower. It means that if you borrow some money from a bank, you have to pay back more than the money you borrowed. Equally, if you have a savings account and deposit some money, the bank will pay you interest as a sort of thank you for saving with th
In this video we are going to look at a few different ways in which plant hormones can be used. Plant growth hormones (auxins) can be used as selective weedkillers. The selective weedkillers contain growth hormones, that cause the weeds to grow really quickly. This means the weed is absorbing nutr
Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In this video we look at how to simplify algebraic fractions, and how to add and subtract them. VISIT us at www.fuseschool.org, wh
