Eutrophication and Agricultural Factors

1. Which of the following are necessary for a mesocosm to survive?

• A) Oxygen, carbon, hydrogen

• B) Nutrient availability, detoxification of waste, energy

• C) Water, sunlight, soil

• D) Biodiversity, herbivores, decomposers

2. Which of the following is NOT a long-term factor harming agriculture?

• A) Erosion

• B) Leaching of nutrients

• C) Pollution

• D) Crop rotation

3. What is eutrophication?

• A) A decrease in nutrients in water

• B) Too many nutrients in water

• C) An increase in oxygen levels in water

• D) The breakdown of organic material

4. What is the main cause of eutrophication?

• A) Overfishing

• B) Fertilizer runoff

• C) Increased oxygen levels

• D) Deforestation

5. What is an algal bloom?

• A) A rapid increase of algae covering the surface of water, suffocating fish

• B) A decrease in algae populations due to pollution

• C) A form of water purification

• D) The result of an oil spill

6. What is biomagnification?

• A) The increase in toxin concentration as it moves up the food chain

• B) The spread of invasive species

• C) The use of fertilizers to increase plant growth

• D) The natural process of food decomposition

7. Which of the following is an example of biomagnification?

• A) Trees absorbing carbon dioxide

• B) Plankton containing mercury, minnows eating plankton, fish consuming minnows

• C) Bacteria breaking down organic waste

• D) Birds migrating in winter

8. What is a harmful effect of small microplastics in the ocean?

• A) They dissolve quickly and cause no harm

• B) They have toxic effects on marine life

• C) They improve water clarity

• D) They are a good food source for fish

9. What is a major issue caused by large macroplastics in the ocean?

• A) They increase fish populations

• B) They break down into nutrients

• C) Seabirds can become entangled

• D) They promote plant growth

10. What is the goal of rewilding?

• A) Restoring habitats

• B) Expanding urban areas

• C) Increasing pesticide use

• D) Reducing water levels