1. RELATIONSHIPS AMONG LIVING THINGS Day 3

2. Interactions Among Living Things Living things depend on one another for survival An organism may have multiple relationships, depending on the organism it interacts with

3. Competition Can be between same species or different species Occurs when resources are limited: –Food –Water –Space –Mate Fight occurs in order to gain resources needed

4. Predation An animal catches and feeds on the captured organism Predator-hunter Prey-hunted

5. Symbiotic Relationships: MUTUALISM Symbiosis-a close relationship between organisms that last over a period of time Mutualism –Both organisms benefit from the relationship –Benefit include food, shelter, protection Plover and Crocodile

6. Symbiotic Relationship: PARASITISM One species benefits but the other specie gets harmed from the relationship Benefit can be food, shelter or protection Parasite-benefits –May reside inside (endoparasite) or outside (ectoparasite) Host-gets harmed The parasite has to ensure that the host does not die. –What happens if the host dies? Mosquito and Human Tapeworm and Human

7. Symbiotic Relationship: COMMENSALISM A relationship wherein one benefits while the other one neither benefits, nor gets harmed or dies. Commensal- the organism that benefits Host- the organism that neither benefits nor gets harmed http://www.youtube.com/watch?v=TGRuen6BMbw

8. Video Segments: The Secret World of Sharks and Rays | Nature | PBS Ecological Relationships: EXAMPLES Video Segments: The Secret World of Sharks and Rays | Nature | PBS

9. Symbiotic Relationships: 1. Yellow- billed Oxpecker eating ticks off the back of a Hippo. Mutualism 2. Elf Owl and Roadrunner both trying to eat an insect. Competition 3. Coral provides home for algae. Algae produces food for coral. Mutualism 4. Tiger hunting a rabbit. Predation 5. Wasp lays eggs on Tomato Hornworn caterpillar. Eggs hatch, burrow into caterpillar and eat it for food. Parasitism 6. Red-tailed Hawk builds nest in branches of Saguaro catcus. Cactus is not harmed. Commensalism

10. What does “Survival of the Fittest” mean? SURVIVAL OF THE FITTEST Nature’s way of determining traits needed by an organism to help it’s species survive- Natural Selection

11.  The traits that help an organism survive in a particular environment /habitat

13. About.com: http://science.discovery.com/videos/100-greatest- discoveries-shorts-natural-selection.html http://app.discoveryeducation.com/search?Ntt=natural+selection

14. The Mono Lake Story The Mono Lake Story - YouTube

15. Is there a relationship which you think is the best? Why do you say so?

16. Picture sources susty.com thefeltsource.com myfourthirds.com catalog.beacon-ridge.com static.seekingalpha.com classes.dma.ucla.edu Bcscience.com bio.miami.edu physicalgeography.net webecoist.com themain-ingredient.info ncwildlife.org wikimedia.org