Predation - Prey-Predator Dynamics - Unsolved Practice Set

Q. Type your question here...

1. One organism (the predator) captures and feeds upon another organism (the prey)
2. Two species compete for the same resource without direct consumption
3. Both species benefit from close association
4. One species lives inside another without harming it

Q2. One important ecological role played by predators in an ecosystem is:

1. Completely eliminating prey species from an ecosystem
2. Helping regulate prey population size and maintaining overall species diversity
3. Having no effect on prey population dynamics
4. Reducing energy flow within the ecosystem

Q3. A "keystone predator" is a predator species whose presence:

1. Has no significant impact on the community structure
2. Plays a disproportionately important role in maintaining the diversity and structure of its community
3. Always leads to the extinction of all prey species
4. Is irrelevant to ecosystem stability

Q4. Which of the following is an example of a prey defence mechanism against predators?

1. Camouflage, allowing prey to blend into their surroundings
2. Toxins that make the prey harmful or unpalatable to predators
3. Mimicry, where a harmless species resembles a harmful one
4. All of the above

Q5. Cyclical fluctuations in predator and prey population sizes over time, such as the classic lynx-hare population cycle, illustrate:

1. The complete independence of predator and prey population sizes
2. The close, dynamic relationship between predator and prey populations, where each influences the other's numbers over time
3. A relationship with no ecological significance
4. A pattern seen only in laboratory settings, never in nature