The reptile heart is different to the heart of a mammal in that:
A) it has two ventricles and one atrium.
B) it has two atria and one ventricle.
C) only the left ventricle functions.
D) only the right atrium functions.
Question 2
Male cockatiels usually have brighter orange or yellow about their head and cheeks than the females.
Indicate whether the statement is true or false