Trophic Levels

What is a trophic level?

• A position in a food chain that indicates the organism's role in the flow of energy and nutrients through an ecosystem.

• A type of ecosystem that supports a variety of species.

• A measure of the energy efficiency of an organism.

• A level of biodiversity within a specific habitat.

How do human activities impact trophic levels?

• Human activities have no effect on trophic levels.

• Human activities can enhance the populations of all organisms.

• Human activities, such as pollution and habitat destruction, can disrupt trophic levels by affecting the populations and interactions of organisms.

• Human activities only affect the primary producers in an ecosystem.

What is the difference between herbivores and carnivores?

• Herbivores are animals that primarily eat plants, while carnivores are animals that primarily eat other animals.

• Herbivores are animals that can eat both plants and animals, while carnivores only eat plants.

• Herbivores are animals that primarily eat insects, while carnivores are animals that primarily eat fruits.

• Herbivores are animals that primarily eat meat, while carnivores are animals that primarily eat fish.

How does energy transfer between trophic levels?

• Energy transfer is highly efficient, with about 50% of energy passed on to the next level.

• Energy transfer is inefficient; typically, only about 10% of the energy is passed on to the next level.

• Energy transfer is instantaneous, with all energy being passed on immediately.

• Energy transfer varies greatly, with some levels receiving up to 90% of the energy.

What is an example of a tertiary consumer?

• A hawk that eats snakes, which are secondary consumers.

• A rabbit that eats grass.

• A deer that eats leaves from trees.

• A snake that eats mice.

What is a food web?

• A simple chain of organisms that eat one another.

• A complex network of feeding relationships among various organisms in an ecosystem.

• A type of food chain that only includes plants.

• A diagram that shows the energy flow in a single species.

What is an omnivore?

• An organism that eats only plants.

• An organism that eats only animals.

• An organism that eats both plants and animals.

• An organism that does not eat at all.

What is a secondary consumer?

• An organism that produces its own food

• An organism that eats primary consumers; they can be carnivores or omnivores.

• An organism that decomposes organic material

• An organism that only eats plants

What type of organisms are usually at the top of the food chain?

• Herbivores

• Carnivores

• Omnivores

• Decomposers

What is the role of decomposers in an ecosystem?

• Decomposers break down dead organic matter, returning nutrients to the soil and completing the nutrient cycle.

• Decomposers produce energy through photosynthesis for plants.

• Decomposers consume living plants and animals to obtain energy.

• Decomposers create new organic matter from inorganic substances.