Nutrient Cycling Quiz II

Which of the following is NOT an importance of water to plants?

• Provides the medium for absorption of mineral salts
• Essential raw material in photosynthesis
• Acts as a medium of transport for plant nutrients
• Maintains osmotic content of body tissues

What is the main component of plant protoplasm?

• Oxygen
• Carbon dioxide
• Water
• Nitrogen

What is the role of water in germination?

• Provides energy for growth
• Activates enzymes for seed development
• Maintains osmotic balance
• Provides protection from pathogens

What is the main function of water in animals?

• Solvent for food digestion
• Component of blood
• Regulates body temperature
• Provides habitat for aquatic organisms

How is gaseous nitrogen converted into nitrates?

• Through the action of thunderstorms
• By nitrogen-fixing microorganisms
• Through the process of photosynthesis
• By denitrifying bacteria

Which type of microorganisms are able to change gaseous nitrogen directly into proteins?

• Free-living bacteria
• Symbiotic bacteria
• Decomposing bacteria
• Nitrifying bacteria

What is the process called when proteins are decomposed into ammonia?

• Putrefaction
• Ammonification
• Nitrification
• Denitrification

What is the process called when ammonia is converted to nitrates?

• Putrefaction
• Ammonification
• Nitrification
• Denitrification

What is the process called when nitrates are converted into gaseous nitrogen?

• Putrefaction
• Ammonification
• Nitrification
• Denitrification

Which process removes water from the water cycle?

• Condensation
• Perspiration
• Photosynthesis
• Transpiration