Bio CFA 2 Review

In a food chain, which organisms are considered primary consumers?

• Organisms that produce their own food.

• Organisms that eat producers.

• Organisms that eat primary consumers.

• Organisms at the very top of the food chain.

If producers in an ecosystem have 90,000 kilocalories of energy, how much energy would be available to secondary consumers?

• 90,000 kilocalories

• 9,000 kilocalories

• 900 kilocalories

• 90 kilocalories

In a food web where birds eat grasshoppers and certain plants, if the bird population significantly decreases, what is a likely immediate effect on the grasshopper population?

• The grasshopper population would decrease due to increased competition.

• The grasshopper population would increase due to fewer predators.

• The grasshopper population would remain unchanged.

• The grasshopper population would migrate to a new area.

What is the primary role of decomposers like bacteria and fungi in a food web?

• To produce their own food using sunlight.

• To consume living plants and animals.

• To break down dead organic matter and return nutrients to the ecosystem.

• To compete with apex predators for food sources.

What type of ecological relationship exists between a bat that roosts in a pitcher plant for shelter and the pitcher plant that receives nitrogen from the bat's waste?

• Parasitism

• Commensalism

• Mutualism

• Predation

Which process converts atmospheric nitrogen gas into ammonia and ammonium, making it usable for organisms?

• Nitrification

• Ammonification

• Denitrification

• Nitrogen Fixation

What biological process utilizes carbon dioxide from the atmosphere as an input to produce glucose and oxygen?

• Cellular Respiration

• Decomposition

• Photosynthesis

• Fermentation

The burning of fossil fuels by human activities primarily contributes to which environmental concern?

• Habitat destruction

• Introduction of invasive species

• Overharvesting

• Greenhouse gas emissions