Ecosystems Test Review

List the levels of organization in an ecosystem going from smallest to largest

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

What organizational level of the ecosystem does a pack of coyotes represent?

• Community
• Population
• Organism
• Ecosystem

Which of the following best describes a population?

• •A.  All the organisms of a certain species in a given area
• •B. All the organisms in a habitat that compete for resources
• •C. One individual and all the organisms on which it depends

The largest most complex level of organization in an ecosystem is the - 

• organism
• community
• ecosystem
• population

Symbiosis is the long term relationship between different species.  In a symbiotic relationship, one organism is always _______.

• harmed
• benefited
• neither harmed or benefited

The relationship between a dog and a tick is an example or symbiosis called parasitism.  Parasitism is a type of symbiosis where one organism is benefited and the other organism is

• harmed
• benefited
• is neither harmed or benefited

Water – biotic or abiotic? 

• biotic
• abiotic

Which of the following describes a change to an abiotic factor of a raccoons habitat that could be harmful to it?

• •A. Increase in the population of food planets. 
• •B. Drought that depletes available water. 
• •C. Increase in population of local predators. 

Which of the following lists includes only abiotic factors?

• A.Plants, animals, average daily temperature
• A.Rainfall amounts, average daily temperature, and minerals in soil. 
• Animals, rainfall amounts, soil composition

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

• •Condensation of moisture on plants for drinking water
• •Plants that bear fruit during summer months
• •Small animals in their habitat of which they feed