Chapter 29
Biology: Life on Earth with Physiology · 9 exercises
Problem 1
What makes the movement of energy through ecosystems fundamentally different from the movement of nutrients?
4 step solution
Problem 2
What is a producer? What trophic level does it occupy, and what is its importance in ecosystems?
3 step solution
Problem 3
Define net primary production. Would you predict higher productivity in a farm pond or an alpine lake? Explain your answer.
4 step solution
Problem 4
Name the first three trophic levels. Among the consumers, which are most abundant? Use the \(^{4} 10 \%\) law" to explain why you would predict that there will be a greater biomass of plants than herbivores in an ecosystem.
4 step solution
Problem 5
How do food chains and food webs differ? Which is the more accurate representation of feeding relationships in ecosystems?
4 step solution
Problem 6
Define detritivore and decomposer and explain their importance in ecosystems.
4 step solution
Problem 7
What are the similarities and differences between carbon and nitrogen cycles?
4 step solution
Problem 8
Why is phosphorus cycle an important process?
3 step solution
Problem 9
How is an increased greenhouse effect disturbing the natural cycles in the environment?
5 step solution