Given that pressure cooker bombs can be created using information readily available online, why does Romero believe the Boston bombers had some level of experience in creating bombs?

Certain information about these bombs are not readily available on the Internet. The marathon bombers had to have carefully their attack since both bombs exploded around the same time.

Explanation:

the answer is poetry : )

explanation:

answer:

Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome.

Explanation:

This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.