A 75-year-old man goes to the hospital emergency department and faints. Five minutes later he is alert. An EKG shows 75 P waves per minute and 35 QRS waves per minute with a normal QRS width. Which of the following is the likely diagnosis?

TLS Online TPP Program

#Question id: 5229

#Unit 11. Evolution and Behavior

Two eukaryotic proteins have one domain in common but are otherwise very different. Which of the following processes is most likely to have contributed to this phenomenon?

TLS Online TPP Program

#Question id: 429

#Unit 1. Molecules and their Interaction Relevant to Biology

An organism that uses organic molecules as carbon sources and obtains energy by oxidizing inorganic molecules is a(an) ________.

TLS Online TPP Program

#Question id: 5028

#Unit 11. Evolution and Behavior

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

1. tetrapods

2. vertebrates

3. deuterostomes

4. amniotes

5. bilaterians

TLS Online TPP Program

#Question id: 21245

#Unit 7. System Physiology – Animal

Which of the following is not correctly paired?

TLS Online TPP Program

#Question id: 19820

#Unit 12. Applied Biology

The hypersensitive response is triggered by certain unique molecules, called elicitors, of pathogen origin. The elicitors are recognized by receptor-like molecules present in