Ecology and Population Quiz

What factors in a population are influenced by the number of individuals?

• Climate changes and natural disasters

• Environmental pollution and extreme weather conditions

• Resource availability and disease prevalence

• Shelter competition and territorial disputes

_____ are biotic components of an ecosystem.

What was the impact on the vegetation in Yellowstone National Park after the removal of wolves?

• Decreased due to overgrazing by deer and elk

• Increased due to less predation on plant-eating animals

• No significant change

• Decreased due to increased competition among plant-eating animals

What is an example of direct competition in an ecosystem?

• Lions and hyenas fighting over a kill

• Birds and squirrels living in the same tree

• Deer and rabbits eating the same type of grass

• Fish and ducks living in the same pond

What is an example of a biotic factor in an ecosystem?

• Soil and air

• Temperature and humidity

• Plants and animals

• Light and heat

What adaptations do cacti have to survive in arid desert conditions?

• They have large leaves to absorb more sunlight

• They have deep roots to reach underground water

• They have thick stems to store water

• They have bright flowers to attract water

Why were wolves reintroduced into Yellowstone National Park?

• To increase the number of predators

• To restore the ecological balance disrupted by their absence

• To provide a new tourist attraction

• To control the population of rabbits

What is the role of pathogens in an ecosystem?

• They help in nutrient cycling

• They are primary producers

• They cause diseases in organisms

• They are responsible for climate regulation

Plants contribute to the carbon cycle in an ecosystem by (a)   .

• They release carbon dioxide through
• They absorb carbon dioxide for phot
• They break down carbon compounds in
• They produce carbon dioxide as a wa

What is the primary role of decomposers in an ecosystem?

• To consume other organisms

• To produce oxygen

• To break down dead organisms and waste, returning nutrients to the soil

• To regulate the climate