Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What type of organisms form the smallest amount of biomass on Earth?

Plants
Fungi
Bacteria
Protozoa

The correct answer is: Bacteria

Bacteria form the smallest amount of biomass on Earth. While they are small in size, bacteria are incredibly abundant and can be found in almost every environment on Earth, including deep in the Earth's crust and in the ocean's depths. Plants and fungi, while important for their roles in the ecosystem, form larger amounts of biomass due to their larger size and ability to photosynthesize. Protozoa, while also small in size, make up a larger portion of the Earth's biomass compared to bacteria. Ultimately, bacteria make up the smallest amount of biomass on Earth due to their small size.