What is the hardest known material to man?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

What is the main process by which plants and algae convert carbon dioxide into glucose?

• Fossilization

• Photosynthesis

• Cellular Respiration

• Decomposition

What is the main process by which animals and plants release energy for biological processes?

• Fossilization

• Decomposition

• Cellular Respiration

• Photosynthesis

What is the main process by which fungi and decomposers release organic compounds and nutrients?

• Fossilization

• Decomposition

• Cellular Respiration

• Photosynthesis

What is the main process by which dead organisms can fossilize over thousands and millions of years?

• Photosynthesis

• Cellular Respiration

• Decomposition

• Fossilization

In this process, decomposers turn nitrogen compounds from dead organisms and organic waste into ammonium (NH4+):

• Photosynthesis

• Fossilization

• Cellular Respiration

• Ammonification

What is the main component of proteins and nucleic acids like DNA and RNA?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

What is the process by which bacteria convert nitrogen gas into ammonium ions?

• Assimilation

• Nitrification

• Ammonification

• Nitrogen Fixation

What is the process by which nitrates are absorbed by plant roots and used to build nucleic acids and proteins?

• Assimilation

• Nitrification

• Nitrogen Fixation

• Ammonification

What is the process by which nitrates are turned into nitrogen gas by denitrifying bacteria?

• Nitrogen Fixation

• Denitrification

• Nitrification

• Assimilation