Human offspring begin with 1 cell that contains 46 chromosomes. This is because each sperm cell contains chromosomes and each egg cell contains chromosomes.
A. 23; 23
B. 23; 46
C. 46; 46
D. 46; 69

The answer is 23;23 because a human has 46 chromosomes.

13) a 14) a15) b16) i don't know sorry17) a (maybe)

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).