Food Chains and Food Webs

Define the term 'predator'.

• A predator is an organism that hunts and consumes other organisms (prey) for food.

• A predator is an organism that only eats plants and does not hunt other organisms.

• A predator is an organism that scavenges dead animals for food.

• A predator is an organism that lives in symbiosis with other organisms.

How do decomposers fit into a food web?

• They produce energy for the food web.

• They break down dead organic matter, returning nutrients to the soil.

• They consume primary producers directly.

• They compete with herbivores for food resources.

How does energy transfer between trophic levels?

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

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

• Energy transfer is 100% efficient, with all energy being passed on to the next level.

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

What is the energy pyramid?

• A graphical representation of the flow of energy at different trophic levels in an ecosystem, with producers at the base and top predators at the apex.

• A type of food chain that only includes herbivores.

• A diagram that shows the number of organisms at each trophic level in an ecosystem.

• A chart that represents the amount of biomass in an ecosystem.

What is a food web?

• A simple chain of organisms that eat one another.

• A complex network of interconnected food chains that illustrates how different organisms in an ecosystem are related through feeding relationships.

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

• A list of all the plants and animals in a specific area.

What is a trophic level?

• A position in a food chain that indicates the organism's role in energy flow

• A type of ecosystem that supports various species

• A measure of the population size in an environment

• A classification of organisms based on their habitat

What is the significance of biodiversity in food webs?

• Biodiversity increases the number of species in an ecosystem, leading to more competition.

• Biodiversity enhances the stability and resilience of food webs, allowing ecosystems to better withstand changes and disturbances.

• Biodiversity reduces the availability of resources for species in a food web.

• Biodiversity has no significant impact on the functioning of food webs.

What is a food chain?

• A circular sequence that shows how energy and nutrients flow in an ecosystem.

• A linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem, starting from producers to various levels of consumers.

• A diagram that represents the food preferences of different animals in a habitat.

• A complex network of interactions between various species in an ecosystem.

Which organisms typically have the least energy in a food web?

• Producers, such as plants

• Primary consumers, such as herbivores

• Top predators, such as owls or hawks

• Secondary consumers, such as small carnivores

Which organisms typically have the most energy in a food web?

• Producers, such as plants

• Primary consumers, such as herbivores

• Secondary consumers, such as carnivores

• Decomposers, such as fungi