Symbiosis by: Emily Nguyen SYMBIOSIS IS A MUTUALLY BENEFICIAL RELATIONSHIP BETWEEN TWO LIVING ORGANISMS.

MUTUALISM

• Mutualism is when both organisms benefit from the relationship, and none are harmed.
• 1. The bee and the flower. Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees. When they land in a flower, the bees get some pollen on their hairy bodies, and when they land in the next flower, some of the pollen from the first one rubs off, pollinating* the plant. This benefits the plants. In this mutualistic relationship, the bees get to eat, and the flowering plants get to reproduce.
• 2. The spider crab and the algae. Spider crabs live in shallow areas of the ocean floor, and greenish-brown algae lives on the crabs' backs, making the crabs blend in with their environment, and unnoticeable to predators. The algae gets a good place to live, and the crab gets camouflage.**
• 3. Oxpeckers and zebras, in this relationship, the oxpecker (a bird) lives on the zebra sustaining itself by eating all of the bugs and parasites on the animal. The bird benefits by having a readily available source of food. The zebra benefits from having the bugs removed. Also, when there is a danger to the zebra, the oxpecker flies high and makes much noise in order to alert nearby animals to the impending danger.

PARASITISM

• Parasitism is a relationship between two different organisms where the parasite harms the host.
• 1. The mosquitoe and human. The mosquitoe will suck on a humans or animals blood, and benefits from it while the other organism gets diseases and itchiness.
• 2. Fleas and animals. The flea will attach itself to an other living animal or human and suck their blood. It benefits from the blood while the the other animal or human suffers from itchiness and diseases.
• 3. Ticks and animals. The tick likes to attach itself to an animal or human, and sucks their blood leaving disease while it does. While the animal or human suffers from disease and itchiness.

COMMENSALISM

• Commensalism is when one living organism benefits from the relationship while the other organism isn't harmed.
• 1. A birds nest and the tree. The bird will build a nest on top of a tree for protection and a good place to live, but the nest doesn't harm the tree.
• 2. The orchid and the tree. In order for the orchid to make its food it needs sunlight, but it's to close to the ground, so it attaches itself to the tree to get sunlight, but the tree isn't harmed.
• 3. The squirrel and the tree. The squirrel needs a safe place to hide for protection, so they climb on the tree to be hidden. Giving it a good spot to hide without harming the tree.