Ecosystem Hierarchy and Environmental Change Worksheet

Which option correctly shows the hierarchy of an ecosystem from the lowest level to highest level?

• A. Organisms, populations, communities, ecosystem

• B. Ecosystem, communities, populations, organisms

• C. Ecosystem, populations, organisms, communities

• D. Organisms, communities, populations, ecosystem

Suppose over time, an environment changes from an area with many trees and dirt to a dry environment with light-colored sand. Which statement predicts what would likely happen to a mouse population in the environment if half of the population had a dark coat color and the other half had a light brown coat?

• The mouse population would become extinct.

• Both groups of mice would survive and reproduce at equal rates.

• The dark-colored mice would survive and reproduce at a higher rate.

• The light-colored mice would survive and reproduce at a higher rate.

Which organisms compete for frogs as a food source?

• Hawks and foxes

• Grasshoppers and beetles

• Snakes and foxes

• Fungi and grass

All the white-tailed deer in the Texas Hill Country make up a ________, while all the plants and animals in the Texas Hill Country make up a ________.

• community; population

• ecosystem; community

• population; ecosystem

• population; community

All of the grasshoppers in a grassland ecosystem are a ____________, while all of the different living things together in the area are a _____________.

• population, community

• community, population

• species, ecosystem

• organism, habitat

Which of the following most correctly identifies the hierarchical organization within an ecosystem?

• Ecological Organization Organism: All snakes Population: Mouse Community: Hawks and owls

• Ecological Organization Organism: Ants, moths, wasps, and plants Population: Ant Community: All ants

• Ecological Organization Organism: Dolphin Population: All dolphins Community: Dolphins, sharks, seals, fish, and plants

• Ecological Organization Organism: Bears, rabbits, deer, trees, and plants Population: All bears Community: Bear

Several characteristics of cell theory are listed on the chart below. Components of Cell Theory I. Organisms are composed of one or more cells. II. Cells are the building blocks of abiotic factors. III. All living organisms consist of millions of cells. IV. All cells come from pre-existing cells. V. Cells are the basic unit of structure and function. Which statements describe the components of cell theory?

• I

• II

• III

• IV

• V

Which of the following is an example of organisms competing for resources?

• A. A bear and an owl eat different foods in the same area.

• B. Two populations of bears eat the same foods in the same areas.

• C. Flamingos return to the same area every day to eat brine shrimp.

• D. Owls eat moths or beetles at night.

The characteristics of a specific living organism are shown on the chart below. Organism Characteristics: - Cells contain a nucleus - Obtains energy from the Sun - Consists of many cells Based on the characteristics, which of the following is a true statement?

• The organism is eukaryotic, heterotrophic, and multicellular.

• The organism is prokaryotic, heterotrophic, and unicellular.

• The organism is prokaryotic, autotrophic, and unicellular.

• The organism is eukaryotic, autotrophic, and multicellular.

How are unicellular and multicellular organisms different?

• Unicellular organisms are made of only one cell, and multicellular organisms are made of two or more cells.

• Multicellular organisms are made of only one cell, and unicellular organisms are made of two or more cells.

• Unicellular organisms are prokaryotic, and multicellular organisms are eukaryotic.

• Multicellular organisms are prokaryotic, and unicellular organisms are eukaryotic.