Ecology & Evolution

Which of these is an example of a biotic factor?

• sunlight

• water

• temperature

• Predators

In this food chain, which organisms are a secondary consumer?

• Lion, snake, owl, wild cat

• mouse

• kite

• tree and rabbit

What process does this define: The process of change by which an organism or species becomes better suited to its environment

• Natural selection

• Adaptation

• Negative feedback

• sexual reproduction

As energy is passed on, from trophic level to trophic level, what percentage of energy is lost?

• 50%

• 5%

• 10%

• 20%

What is an autotroph?

• An organism that produces complex organic compounds from simple substances present in its surroundings in order to obtain the energy needed to survive

• An organism that ingests or absorbs organic carbon in order to be able to produce energy and synthesise compounds to maintain its life.

• An organism which obtains food energy from other organisms

• An organism which obtains their energy in food compounds obtained by eating other animals

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

A living relationship between two species in which one organism is harmed is called...

• mutualism
• commensalism
• parasitism
• niche

What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

Which of the following would be the definition of a detritivore?

• Animals that eat insects.

• Organisms that feed on rocks, recycling the nutrients back into the ground.

• Organisms that feed on dead organisms by physically eating and digesting them

• Organisms that feed on dead organisms, recycling the nutrients back into the ground.