Copyright

Holt McDougal Modern Biology Chapter 21: Ecosystems Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Why are primary producers important?

Question 2 2. Which of the following might contain fresh water but is not always considered a freshwater biome?

Question 3 3. If a plant species is endemic to Mt. Kilimanjaro, what does that mean?

Question 4 4.

Which of the following statements about estuaries are true?

A. They are the gateway to freshwater breeding grounds of some marine animals

B. They are the breeding grounds for many types of aquatic animals

C. Estuaries are resistant to pollution because the constant inflow of freshwater flushes the pollutants out into the ocean.

D. They are areas where freshwater streams or rivers merge with the sea

Question 5 5. Which ecosystem is characterized by high biodiversity and numerous organisms that are nocturnal?

Page 2

Question 6 6. Why does the biodiversity of estuaries and salt marshes fluctuate?

Question 7 7. Which of the following is NOT true about plants in freshwater biomes?

Question 8 8. Which biome has the greatest species richness?

Question 9 9. The largest biome on our planet is the _____ biome.

Question 10 10. Why are freshwater biomes important?

Page 3

Question 11 11. On a total net basis, which biome is the most productive?

Question 12 12. Which ecosystem is characterized by a photic zone and low biodiversity?

Question 13 13. Floating organisms that drift with the ocean current and form the base of many food chains are known as

Question 14 14. _____ is a measure of the salt content of ocean water.

Question 15 15. The temperature of the ocean is _____ all over the world.

Page 4

Question 16 16. What is a taiga biome?

Question 17 17. What types of animals can be found in freshwater biomes?

Question 18 18. What is a frozen lake an example of? Choose the best answer.

Question 19 19. Which of the following is true about deserts?

Question 20 20. In which of the following biomes would you expect to find a complete absence of plant life.

Page 5

Question 21 21. What kinds of conditions are typical of areas with temperate deciduous forests?

Question 22 22. What is NOT true about freshwater biomes?

Question 23 23. _____ percent of marine life lives in the upper zone of the ocean that receives sunlight.

Question 24 24. Which part of the Sierra Nevada mountain range receives the highest amount of rainfall?

Question 25 25. Which of the following is true about savannas?

Holt McDougal Modern Biology Chapter 21: Ecosystems Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Holt McDougal Modern Biology: Online Textbook Help  /  Science Courses
Support