Environmental Effects on Phenotype | AP Biology 5.5 скачать в хорошем качестве

Environmental Effects on Phenotype | AP Biology 5.5

This section of the AP Biology curriculum looks at the several different ways the environment can change the phenotype that an organism expresses. First, we’ll take a look at what environmental variation is, and how it can take place in an organism. Then, we’ll see how some environmental variations serve a specific purpose, while other variations are simply coincidental interactions between the environment and different aspects of an organism that cause a measurable phenotypic change. After we look at an example of how soil pH can change the color of Hydrangea flowers, we’ll see a trait with phenotypic plasticity that has evolved specifically to increase the fitness of an organism: the seasonal change of coat color in snowshoe hares. These changes are epigenetic, in that they result from a differential expression of various genes based on environmental stimuli. Finally, we’ll take a look at several traits with environmental variability including melanin production in response to UV light and temperature-dependent sex determination in reptiles! Resources related to this Video: ● Overview: The same information, for those who prefer to read. Get it here: https://biologydictionary.net/ap-biol... ● Quick Test Prep: You can find answers to the questions in this video here: https://biologydictionary.net/ap-biol... ● PowerPoint: If you like our presentation, you can download the file here: https://biologydictionary.net/ap-biol... ● Crossword Puzzle: Need to brush up on your vocabulary for this section? Get a crossword (with answers) here: https://biologydictionary.net/ap-biol... All of our individual resources for this subject are free to view, and only $0.99 to download! Enjoy!