Life Science Review

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among various organisms in an ecosystem, showing how energy and nutrients flow through different trophic levels.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or food web that indicates the organism's role in the flow of energy and nutrients, such as producers, primary consumers, secondary consumers, and tertiary consumers.

Front

What percentage of energy is typically transferred to the next trophic level?

Back

About 10% of energy is transferred to the next trophic level in an energy pyramid.

Front

What is a primary consumer?

Back

A primary consumer is an organism that eats producers (plants or algae) and is typically herbivorous.

Front

What is a secondary consumer?

Back

A secondary consumer is an organism that eats primary consumers and can be either carnivorous or omnivorous.

Front

What is a tertiary consumer?

Back

A tertiary consumer is an organism that eats secondary consumers and is usually at the top of the food chain.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants and algae, convert sunlight into energy through photosynthesis, forming the base of the food web.

Front

What is the significance of plankton in aquatic ecosystems?

Back

Plankton are crucial as they serve as the primary producers in aquatic ecosystems, providing energy for a wide range of marine organisms.

Front

What is a calorie?

Back

A calorie is a unit of energy, specifically the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius.

Front

How do energy pyramids illustrate energy transfer?

Back

Energy pyramids visually represent the amount of energy available at each trophic level, showing that energy decreases as it moves up the pyramid.