A Level Biology Revision "Translocation in the Phloem" скачать в хорошем качестве

A Level Biology Revision "Translocation in the Phloem"

You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/... In this video, we look at translocation in the phloem. First we explore what is meant by a source and a sink. We then explore how active loading of sucrose into the phloem takes place in the source and how this leads to mass flow of assimilates in the phloem. Finally, we look at the evidence for this active model of translocation. Image credits: Leaf with sun https://commons.wikimedia.org/wiki/Fi... Govindaraj Mahalakshmi, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Potato Plant https://commons.wikimedia.org/wiki/Fi... Arg12730, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Roots https://commons.wikimedia.org/wiki/Fi... Rosser1954, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Shoot https://commons.wikimedia.org/wiki/Fi... sakura from between places, CC BY 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons