Symbiotic relationships

The behaviors and physical characteristics of a species that allow them to live successfully in their environment are called

• habitats

• limiting factors

• biotic factors

• adaptations

Mutualism, commensalism, and parasitism are the three types of

• prey adaptations

• comptetition.

• predation

• symbiotic relationships.

When a hawk builds its nest on the arm of a saguaro cactus, the hawk is helped and there is no effect on the cactus. This is an example of

• commensalism.

• mutualism

• parasitism

• predation

When a flea is using a dog for resources but does not kill the dog, the dog is the

• parasite

• host

• predator.

• prey

When a lion chases down and kills a gazelle this is called

• parasitism.

• commensalism

• mutualism

• predation

The struggle between organisms to survive in a habitat for the same limited resources is called

• competition

• predation

• symbiosis

• parasitism

The largest population that an environment can support is called its

• limiting factor.

• carrying capacity.

• birth rate.

• death rate.

Question: When the wolf population (predator) in Isle Royale decreased from 1980 - 1990, what happened to the moose (prey) population?

• Moose population did not have any change.

• Moose population decreased.

• Moose population increased.

If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is

• 100 beetles per square meter.

• 20 beetles per square meter.

• 5 beetles per square meter.

• 4 beetles per square meter.

In the NACS Nature Center we found that there are 104 white oak trees inside of the 4 km2 area. What is the population density of the white oak trees?

• 26 trees/km2

• 100 trees/km2

• 108 trees/km2

• 416 trees/km2