Echolocation

http://www.thewildclassroom.com/bats/echolocation.html (bats - YouTube Video)

https://www.sciencenewsforstudents.org/article/echoes-hunting (bats)

http://www.physicscentral.com/explore/action/navigatingworld.cfm (mostly about bats and humans that are visually impaired – YouTube video)

https://wonderopolis.org/wonder/how-do-dolphins-use-echolocation (dolphins)

https://thekidshouldseethis.com/post/69881908902 (dolphins - YouTube video)

Tropism

https://www.wiziq.com/tutorial/33393-Who-says-plants-don-t-move (really good YouTube video – phototropism and geotropism)

https://www.howplantswork.com/2013/11/19/breaking-blue-new-clues-about-how-light-shapes-plants/ (a bit higher-level reading)

http://plantsinmotion.bio.indiana.edu/plantmotion/movements/tropism/tropisms.html (links on left of screen go to info about different types of phototropism and gravitropism)

https://www.hoddereducation.co.uk/media/Documents/magazine-extras/Biological%20Sciences%20Review/BSR%20Vol%2025%20No%204/BiolRev-25_4-centre.pdf?ext=.pdf (examples of different types of tropisms)

Human Reflexes

https://kidshealth.org/en/kids/reflexes.html

https://wonderopolis.org/wonder/how-do-reflexes-work

https://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=1&ContentID=562

https://www.ducksters.com/science/nervous_system.php

Fixed Action Pattern

https://www.realclearscience.com/blog/2011/11/fixedactionpatterns.html

https://www.khanacademy.org/science/biology/behavioral-biology/animal-behavior/a/innate-behaviors (also talks about reflexes)

https://study.com/academy/lesson/fixed-action-pattern-definition-examples-quiz.html