Unit 6: Ecology Review

What is a trophic level?

• A position in a food chain or food web, defined by how organisms obtain energy.

• A type of ecosystem where organisms live together.

• The total number of species in a habitat.

• A measure of the energy produced by plants.

What is a population in ecology?

• A group of individuals of the same species living in a specific area.

• A collection of different species in a habitat.

• The total number of organisms in an ecosystem.

• A group of individuals from different species living together.

What role do producers play in an ecosystem?

• Producers convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.

• Producers are organisms that consume other organisms for energy.

• Producers decompose organic matter and recycle nutrients back into the soil.

• Producers are responsible for regulating the population of herbivores in an ecosystem.

If there are 1000 Kcal available in the producers, how much energy is available in the herbivores?

• 50 Kcal

• 100 Kcal

• 200 Kcal

• 300 Kcal

What is the difference between a food chain and a food web?

• A food chain is a complex network of interconnected food chains, while a food web is a linear sequence of organisms through which nutrients and energy pass.

• A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

• A food chain includes only plants, while a food web includes both plants and animals.

• A food chain is a type of food web that only includes herbivores.

What is the correct order of ecological levels from basic to complex?

• Community, population, ecosystem, biosphere, individual

• Individual, community, ecosystem, biosphere, population

• Individual, population, community, ecosystem, biosphere

• Population, individual, community, biosphere, ecosystem

How do decomposers contribute to an ecosystem?

• Decomposers break down dead organic matter, recycling nutrients back into the soil.

• Decomposers produce energy through photosynthesis.

• Decomposers compete with plants for sunlight and nutrients.

• Decomposers create new organic matter from inorganic substances.

What is the primary source of energy for most ecosystems?

• The moon.

• The sun.

• Volcanic activity.

• Geothermal energy.

What is the difference between biotic and abiotic factors?

• Biotic factors are non-living components of an ecosystem, while abiotic factors are living physical and chemical elements.

• Biotic factors are living components of an ecosystem, while abiotic factors are non-living physical and chemical elements.

• Biotic factors are the chemical processes in an ecosystem, while abiotic factors are the biological processes.

• Biotic factors are the interactions between species, while abiotic factors are the climate conditions.

Which animal is most closely related to humans?

• Mouse

• Chimpanzee

• Dog

• Cat