Levels of Organization

Which of the following correctly lists the levels of organization from least complex to most complex?

• Community, Organism, Population, Ecosystem

• Population, Community, Ecosystem, Organism

• Organism, Population, Community, Ecosystem

• Ecosystem, Population, Organism, Community

The sum of all living things on earth is called...

• Ecosystem

• Biosphere

• Environment

• Habitat

Which of the following is a description of an abiotic factor that makes up part of a desert habitat?

• Sparse growth of cottonwood trees

• Extremes of day and night temperatures

• Few large predators, such as coyotes

• Leafless, waxy-coated plant with sharp spines

Tags

NGSS.MS-LS1-5

Which organizational level of the ecosystem does a pack of wolves represent?

• Ecosystem

• Organism

• Population

• Habitat

A macaw is a type of parrot with colorful feathers that flies about in the upper canopy of trees in tropical rainforests. Macaws have a diet which includes fruits, leaves, nuts, and seeds of plants. Which of the following describes a biotic factor of the macaw’s habitat that provides a survival advantage for these birds?

• The colorful feathers are lost and regrow each year

• Some rainforest predators are able to climb trees

• Trees provide shelter and abundant food supplies

• During some periods, rain falls nearly every day

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following describes a biotic factor that would be an advantage to a certain species of freshwater plants in a pond ecosystem?

• Increased rainfall that leads to the habitat of the plants covering more area

• Reduction in the population of fish in the pond that eat plants

• Toxic waste and trash being dumped into the pond where the plants live

• Introduction to the pond of another species of plants that compete for resources

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following descriptions represents the community level of organization?

• A single individual rabbit, of a certain species, living in a forest

• A group of rabbits, all of the same species, living in a forest

• All of the rabbits in a forest, as well as their predators and food plants

• All of the animals, plants, and non-living elements in a forest

Tags

NGSS.MS-LS2-5

Which of the following describes a change in a biotic factor that will be a disadvantage for a certain species of fish living around coral reefs in shallow seas?

• Heavy rains lower the salinity of the water for a long period of time

• Excessive cold weather lowers the temperature in the area

• Other fish species, which compete for the same resources, die out

• The number of predators, such as sharks, increases dramatically

Tags

NGSS.MS-LS2-4

All the biotic and abiotic factors in a specific area is called...

• Ecosystem

• Biosphere

• Environment

• Habitat

Meat-eating desert reptiles depend on which of the following biotic factors to supply their needs?

• Daytime temperature ranges above 30 degrees Celsius

• Condensation of moisture on plants for drinking water

• Small animals in their habitat on which they feed

• Plants that bear fruits during the summer months

Tags

NGSS.MS-LS2-1