Unit 6 LS Ecosystems

Which of the following is not one of the categories of ecosystems?

• Marine

• Freshwater

• Terrestrial

• Biome

Which type of ecosystem is the most abundant on Earth covering approximately 75% of the planet?

• Freshwater

• Terrestrial

• Arctic

• Marine

Biotic factors include:

• Oxygen

• Rainfall

• Carbon dioxide

• Plants

Soil contains both abiotic and biotic materials. Which is a biotic factor within soil?

• Minerals

• Grains of sand

• Gravel

• Dead decomposing leaves

Which of the following describes one or more living organisms depending on another living organism to survive?

• Bacteria living in a bear's mouth

• Wolves breathing in oxygen

• Salmon laying eggs in the river

• Glaciers melting in the sunlight

Which of the following correctly lists the ecological levels of organization from the largest level to the smallest level?

• Population, organism, community, ecosystem, biosphere

• Organism, population, community, ecosystem, biosphere

• Community, population, organism, biosphere, ecosystem

• Biosphere, ecosystem, community, population, organism

What is the largest geographic area that contains all the ecosystems on Earth?

• Biosphere

• Community

• Population

• Organism

All the populations of organisms that live together in the same environment, and interact with each other, make up a(n) ____________________.

• Biosphere

• Community

• Ecosystem

• Population

A community ecologist is most likely studying which of the following?

• The changes in the total count of white-tailed deer that live in a forest

• How the population of white-tailed deer impacts the population of wolves

• How the white-tailed deers impact erosion and river flooding

• How a white-tailed deer digests grass

Which of the following ecological levels of organization is matched with a correct description?

• Population – All the biotic and abiotic factors in an environment

• Organism – All the members of a species living in a given area at the same time

• Community – All the living organisms in a given area

• Ecosystem – An individual made of one or more cells