Multiple Choice
You are presented with a heart from an unknown organism. Upon studying the heart, you note that it has a small node of tissue in the right atrium and that it has a single aorta leading directly from the left ventricle. Based on these observations, from what kind of organism must this heart have come from?
A) Reptile
B) Amphibian
C) Bony fish
D) Bird or mammal
E) Cartilaginous fish
Correct Answer:

Verified
Correct Answer:
Verified
Q1: In humans, approximately how much of the
Q2: If someone with haemoglobin-rich blood, living at
Q3: Which groups of vertebrates have a completely
Q4: Exercise requires homeostatic adjustment in blood flow
Q5: A recording of the electrical activity of
Q7: The human heart consists of how many
Q8: Regulation of arterial blood pressure in vertebrates
Q9: The veins of vertebrates<br>A) carry blood towards
Q10: In the mammalian heartbeat<br>A) contractions are initiated
Q11: In primitive vertebrates the sixth aortic arch