The structure of the male breast is nearly identical to that of the female breast, except that the male breast tissue lacks the specialized lobules, as there is no physiologic need for milk production by the male breast.
The source is the allele for beak size being different, or more specifically the DNA sequences being different.
Answer:
A. a positive and negative ion
Explanation:
two positive ions will not form a bond since opposite charges repel
any two atoms is too broad, meaning it can form any bond not specifically an ionic bond
two carbon atoms will form a covalent bond since they are nonmetals and will share electrons
Answer: Nucleotides, Let me know if it was right. :)