Question

name____ period____ symbiosis worksheet directions: classify each of the following scenarios as mutualism, commensalism, or parasitism. 1. barnacles create home sites by attaching themselves to whales. mutualism commensalism parasitism 2. ticks feed on deer blood to the deers detriment. mutualism commensalism parasitism 3. the stork uses its saw - like bill to cut up the dead animals it eats. as a result, the dead animals carcass is accessible to some bees for food and egg laying. mutualism commensalism parasitism 4. ostriches and gazelles feed next to each other. they both watch for predators and alert each other to danger. since the visual abilities of the two species are different, they each can identify threats the other animal would not as readily see. mutualism commensalism parasitism 5. yucca flowers are pollinated by yucca moths. the moths lay their eggs in the flowers where the larvae hatch and eat some of the developing seeds. both species benefit. mutualism commensalism parasitism 6. hermit crabs live in shells made and then abandoned by snails. mutualism commensalism parasitism 7. a cuckoo may lay its eggs in a warblers nest. the cuckoos young will displace the warblers young and will be raised by the warbler.8. as buffalos walk through the grass, insects become active and are seen and eaten by cowbirds. mutualism commensalism parasitism 8. silverfish live and hunt with army ants. they share the prey. mutualism commensalism parasitism 9. oxpeckers feed on ticks found on rhinos. mutualism commensalism parasitism 10. wrasse fish feed on the parasites found on the black seas bass body. mutualism commensalism parasitism 11. mistletoe extracts water and nutrients from the spruce to the spruce trees detriment. mutualism commensalism parasitism

Explanation:

1. Barnacles benefit from attachment to whales without harming or helping whales, so it's commensalism.
2. Ticks harm deer by feeding on their blood, so it's parasitism.
3. Stork's action benefits bees without affecting stork negatively or positively, so it's commensalism.
4. Ostriches and gazelles both benefit from watching for predators, so it's mutualism.
5. Yucca flowers and yucca moths both benefit from pollination and egg - laying/seeds consumption, so it's mutualism.
6. Hermit crabs use abandoned snail shells without affecting snails, so it's commensalism.
7. Cuckoo benefits at the expense of warbler, so it's parasitism.
8. Silverfish and army ants share prey, so it's mutualism.
9. Oxpeckers benefit by eating ticks and rhinos benefit from tick removal, so it's mutualism.
10. Wrasse fish benefit by eating parasites and black sea bass benefit from parasite removal, so it's mutualism.
11. Mistletoe harms spruce tree by extracting nutrients, so it's parasitism.

Answer:

1. COMMENSALISM
2. PARASITISM
3. COMMENSALISM
4. MUTUALISM
5. MUTUALISM
6. COMMENSALISM
7. PARASITISM
8. MUTUALISM
9. MUTUALISM
10. MUTUALISM
11. PARASITISM