Interactions between species

What is symbiosis?

• Symbiosis is the interaction between two organisms of different species living in close proximity.

• Symbiosis is a temporary interaction between two unrelated organisms.
• Symbiosis refers to the process of evolution within a single species.
• Symbiosis is a type of competition between two species.

The clownfish provides anemone with nutrients while the anemone protects them from predators. What type of interaction is this?

• Commensalism

• Amensalism

• Competition

• Mutualism

Plants provide a place to hide for frogs, the frogs do not harm or benefit the tree. What type of interaction is this?

• Predation

• Commensalism

• Parasitism

• Mutualism

The cheetah kills the springbok for food. What type of interaction is this?

• Competition

• Ectoparasite

• Predation

• Endoparasite

The mosquito sucks blood from animals and lives outside the host. What type of interaction is this?

• Endoparasite

• Predation

• Ectoparasite

• Amensalism

The tapeworm lives inside and obtains nutrients from the host gastro-intestinal tract. What type of interaction is this?

• Endoparasite

• Predation

• Mutualism

• Ectoparasite

Sheep and cattle trample on grasses. They receive no benefit but the grasses are damaged. What type of interaction is this?

• Interspecific competition

• Commensalism

• Amensalism

• Parasitism

Lions and hyenas live in the same ecosystem, hunt the same prey and often fight each other. What type of interaction is this?

• Predation

• Intraspecific competition

• Interspecific competition

• Mutualism

Seagulls often fight over the same food, e.g. your chips. What type of interaction is this?

• Intraspecific competition

• Commensalism

• Ectoparasitism

• Interspecific competion

Which of the following are true about keystone species?

• A keystone species is a type of predator that controls the population of other species.
• A keystone species has an ecological effect greater than its relative population size.

• A keystone species is crucial for maintaining the ecological balance in an environment.
• A keystone species is any species that is large in size and has a longer lifespan than other animals in the ecosystem.