Principles of Ecology: Organisms and Their Relationships Review

The study of the interactions of living things with each other and their physical environment.

• ecology

• limiting factor

• biotic factor

• abiotic factor

the living and nonliving things present in an ecosystem that prevent a population from growing beyond a certain size, including food, water, available mates, and predators

• ecology

• limiting factor

• biotic factor

• abiotic factor

all living things in an ecosystem, including animals, bacteria, plants, fungi, and other living species

• ecology

• limiting factor

• biotic factor

• abiotic factor

all nonliving things in an ecosystem, including water, rocks, sunlight, weather, natural disasters, oxygen, space, hunting, and shelter

• ecology

• limiting factor

• biotic factor

• abiotic factor

What are three types of symbiotic relationships?

• mutualism, commensalism, parasitism

• population, community, organism

• biotic, abiotic, limiting factor

• saprophyte, heterotroph, autotroph

What is a niche?

• the job of an organism in an ecosystem

• a tree branch with a notch cut out of it

• water eroding soil from the edge of a river

• plants competing for sunlight

A group of gray wolves living in Minnesota is an example of

• a community

• a biome

• an ecosystem

• a population

All the living communities in an area PLUS the abiotic factors.

• population
• ecosystem
• biome
• habitat

A squirrels niche would be _________________.

• hunting prey and providing meat for other squirrels.

• searching for fish to eat in the ocean.

• staying busy storing nuts and seeds for winter.

• help decompose other animals and plants.

Ants protect soft bodied aphids and in return the aphids feed the ants a sugary drink. What is the ecological relationship?

• Cooperation
• Parasitism
• Commensalism
• Mutualism