15.  Which organisms may be a keystone species in a tropical rain forest?

25.  The major components of Earth’s atmosphere, from the lowest concentration to the greatest concentration are:

3.  At zero population growth:

16.  Traditionally, most ecologists have assumed that community stability is a consequence of:  

23.  What key factor limits the number of trophic levels in ecosystems?

9.  What is a typical feature of K- selected organisms?

8.  Iteroparity is common in which of the following organisms?

 Which of the following factors increases the burn client’s risk for venous thrombus embolism (VTE)? Select all that apply.

CASE STUDY: The nurse is caring for a client with peptic ulcer disease (PUD) who presented to the emergency department. The nurse is to assist the provider in performing bedside endoscopy on this client. Which of the following actions would the nurse consider the highest priority in regard to the procedure?

The nurse is caring for the client with a Sengstaken-Blakemore tube in place when the client suddenly shows signs of severe epigastric pain and respiratory distress. The nurse should do which of the following first?