AT, GC
Explanation:
Adenine (A) pairs with Thymine (T).
Guanine (G) pairs with Cytosine (C).
A - T
C - G
T - A
T - A
G - C
C - G
hope this helps you!
Question 1: B: rapid water drainage
The pig heart is big,and the chicken heart is small.
The answer is : linea aspera
