Question

tyin block - independent practice: symbiotic relationships
identify the type of symbiotic relationship shown in each of the following. write the letter of your answer on the blanks provided.
a. commensalism | b. mutualism | c. parasitism

1. fungus and algae live together. the fungus gets food from the algae while the algae gets a place to live.
2. the round - worm anchors itself to the wall of the intestine and causes diseases to the organisms.
3. spiders create their webs on stems and trunks of plants.
4. insects get nectar from flowers. they also transfer the pollen that gets stuck in their bodies to another flower.
5. orchids perch on sturdier plants. they cause no harm to the host plant. they benefit simply from being exposed to sunlight.
6. the waste plant sap produced by aphids are used by ants for nutrition. the ants protect the aphids from parasites.
7. an oyster attaches itself to a mangrove. the oyster has a place to live, but the mangrove is unharmed.
8. many bacteria live in the human intestines. these bacteria feed on the food in our guts without harming us.
9. a sea lamprey uses its oral disc to attach itself to a larger fish, bores a hole through the fishs flesh, & sucks its blood.
10. the shrimp digs to burrow itself and the goby fish. in case of danger, the goby fish touches the shrimp with its tail.

11.
12.
13.
14.
sea snail
makes hard, round shells to live in for protection
hermit crab
uses shells made by other animals for protection
zookanthellae (algae)
produces extra nutrients
needs a hard place to live for protection
coral reef
provides a hard place to live
needs nutrients to grow faster
deer
moves around a lot through forests and feeds
burdock
has sticky burrs that need to be carried around to make new burdock plants
sea anemone
has stinging tentacles
needs water - flow to feed
hermit crab
moves around a lot
needs protection from predators

Explanation:

1. Both fungus and algae benefit, so it's mutualism (B).
2. The round - worm benefits while the organism is harmed, so it's parasitism (C).
3. Spiders benefit from plants and also help in pollination, mutualism (B).
4. Insects get nectar and help in pollination, mutualism (B).
5. Orchids benefit from sturdier plants without harming them, commensalism (A).
6. Aphids and ants both benefit, mutualism (B).
7. Oyster benefits and mangrove is unharmed, commensalism (A).
8. Bacteria benefit and humans are unharmed, commensalism (A).
9. Lamprey benefits and fish is harmed, parasitism (C).
10. Shrimp and goby fish both benefit, mutualism (B).
11. Hermit crab uses sea - snail's shell, commensalism (A).
12. Burdock benefits from deer moving it around, commensalism (A).
13. Zooxanthellae and coral reef both benefit, mutualism (B).
14. Sea anemone and hermit crab both benefit, mutualism (B).

Answer:

1. B
2. C
3. B
4. B
5. A
6. B
7. A
8. A
9. C
10. B
11. A
12. A
13. B
14. B