BONUS #4:    Which of the following pairs is the best example of homologous structures?  

  In the phylogenetic trees shown, each number represents a unique species of organisms.  Which two species are represented as sister species in Tree 2 but are not represented as sister species in Tree 1?      

Which substance is produced by the pancreas and helps neutralize stomach acid?

Which structure collects urine from multiple nephrons?

What structure in the nephron filters blood?

Discuss the function of bile in the digestive system and explain how it aids in fat digestion.

Explain the role of the respiratory system in maintaining homeostasis.

What is the primary chemical factor that stimulates breathing?

What is the study of organisms at the early stages of development?

Which respiratory volume represents the amount of air exchanged during normal breathing?