Which of the following is an example of mutualism?

• A lion hunting a zebra

• Bees pollinating flowers

• A tapeworm in a human intestine

• A bird eating ticks off a buffalo

What role does a producer play in a food web?

• Decomposer

• Predator

• Herbivore

• Autotroph

Which of the following is a common impact of invasive species on native ecosystems?

• Increased biodiversity

• Stabilization of food webs

• Disruption of local species populations

• Improved soil fertility

Which process is part of the carbon cycle?

• Photosynthesis

• Nitrogen fixation

• Evaporation

• Decomposition

What is the first step in the nitrogen cycle?

• Nitrification

• Denitrification

• Nitrogen fixation

• Ammonification

Identify the type of symbiotic relationship where one organism benefits and the other is harmed.

• Mutualism

• Commensalism

• Parasitism

• Predation

In a food web, what is the primary role of decomposers?

• To produce energy

• To recycle nutrients

• To consume producers

• To hunt prey

How do invasive species typically spread to new environments?

• Through natural migration

• By human activities

• By climate change

• Through genetic mutation

Which stage of the carbon cycle involves the release of carbon dioxide into the atmosphere?

• Photosynthesis

• Respiration

• Nitrogen fixation

• Precipitation

What is the role of bacteria in the nitrogen cycle?

• They fix nitrogen from the atmosphere

• They decompose organic matter

• They produce oxygen

• They absorb carbon dioxide