Populations and Communities

A freshwater lake has a muddy bottom, which is home to different types of algae and other organisms. Many species of fish feed on the algae. Which of the following is an ABIOTIC factor in this ecosystem?

• the temperature of the water
• the color of the algae
• the number of species of fish
• the amount of food available to the fish

Tags

NGSS.MS-LS2-3

Which of the following lists the levels of organization in an ecosystem from the smallest unit to the largest?

• population, organism, community, ecosystem
• organism, population, ecosystem, community
• organism, community, population, ecosystem
• organism, population, community, ecosystem

All the living and nonliving things that interact in a particular area make up a(n)

• ecosystem
• population
• community
• biome

All the different populations that live together in an area make up a(n)

• ecosystem
• community
• habitat
• organism

A(n) ______ is a group of organisms that are physically similar and can mate with each other to produce offspring that can also mate and reproduce.

• organism
• species
• population
• community

A prairie dog, a hawk, and a badger all are members of the same ________________.

• niche
• community
• species
• population

The nonliving parts of an ecosystem are called

• populations

• organisms

• biotic factors

• abiotic factors

A population is all the members of one species living in a particular

• area

• habitat

• ecosystem

• community

Nutrients in the soil from decaying remains of animals is a(n) ____________ factor of an organism’s habitat.

• biotic

• abiotic

• predatory

• fertilization

All the biotic and abiotic factors in an area together make up a(n) ____________________.

• community

• ecosystem

• biome

• area