Quiz 1.3 Interactions in Ecosystems

This is a photograph of a new island called Surtsey as it was being born from an underwater volcano in 1963.

When this island first formed, initially it contained
1. only abiotic elements.
2. only soil.
3. lichens and mosses.
4. only seeds.
This is a photograph of a new island called Surtsey as it was being born from an underwater volcano in 1963.

What is an abiotic factor that would initially impact this new island?
1. Erosion
2. Competition
3. Symbiosis
4. Predation
Wolves tend to live in packs consisting of the mother, the father and their offspring.

Each wolf pack occupies a territory that it travels in search of prey. If another wolf attempts to hunt in this territory these wolves may chase it off or even kill it. This biotic interaction between the pack and any intruder wolf is known as what?
1. Competition
2. Mutualism
3. Predation
4. Parasitism
What biotic interaction is not an example of symbiosis?
1. Competition
2. Parasitism
3. Commensalism
4. Mutualism
In the wild, clownfish form relationships with sea anemones. The relationship is complicated; the brightly coloured clownfish lures bigger fish to the anemone, which sting and consume the bigger fish. The clownfish feed on the leftovers. The clownfish are immune to the stings from the anemone tentacles, and will hide in the tentacles for protection.

The clownfish and the anemone display which kind of biotic interaction?
1. Mutualism
2. Commensalism
3. Predation
4. Parasitism
This graph represents the growth of a rabbit population over time.

Which statement about this graph is false?
1. This population must be experiencing no predation because the number of rabbits is steadily increasing
2. If the rabbit population remained at carrying capacity for a long time it likely did not harm its environment
3. When the rabbit population reached carrying capacity, the average number of rabbit births equaled the average number of rabbit deaths
4. The rabbit population increased most rapidly during the period in which the population was between 1/3 carrying capacity and 2/3 carrying capacity
What is a possible abiotic limiting factor in an environment?
1. Drought
2. Competition
3. Predation
4. Disease
Which statement about limiting factors is false?
1. A limiting factor always destroys a population
2. A limiting factor can be biotic or abiotic
3. A limiting factor can prevent a population from moving into a new habitat
4. A limiting factor can be healthy in that it prevents overpopulation
This graph compares lynx and hare populations in which hares are preyed upon by lynxes.

Why do the lynx population increases tend to follow the hare population increases?
1. When the number of hares increases the lynx population increases in response to an increase in its food supply
2. When the number of hares increases, more lynxes move in to compete with them
3. Lynxes and hares share the same niche so when hares increase the lynxes also increase because their niche has improved
4. The lynxes are in competition with the hares for the same food supply so when one population increases the other one also increases because the food supply is plentiful at that time
This graph compares lynx and hare populations in which hares are preyed upon by lynxes.

Which limiting factor is most likely responsible for the pattern in this graph?
1. Predation
2. Disease
3. Competition
4. Space