Without looking at the lesson, write the signs for species 1 and species 2 in each interaction…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Without looking at the lesson, write the signs for species 1 and species 2 in each interaction.
- Mutualism.
- Competition.
- Predation.
- Commensalism.
- Amensalism.
- Which two interactions have the same signs? How do they differ?
Need a reminder? The key ideaShow
Parasitism (+, −), commensalism (+, 0), amensalism (−, 0), mutualism (+, +), competition (−, −), predation (+, −).
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) (+, +).
Step 2. (b) (−, −).
Step 3. (c) (+, −).
Step 4. (d) (+, 0).
Step 5. (e) (−, 0).
Step 6. (f) Predation and parasitism are both (+, −). A predator kills and eats its prey. A parasite lives on or in its host and takes food from it, usually for a long time.
Answer: (a) (+, +); (b) (−, −); (c) (+, −); (d) (+, 0); (e) (−, 0); (f) predation and parasitism.
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