Answer:
The head of the sperm contains the nucleus. The nucleus holds the DNA of the cell. The head also contains enzymes that help the sperm break through the cell membrane of an egg. The midpiece of the sperm is packed with mitochondria.
Explanation:
the answer is C. thinking about a problem constantly
Musculoskeletal System. When the body is stressed, muscles tense up. Muscle tension is almost a reflex reaction to stress — the body's way of guarding against injury and pain. With sudden onset stress, the muscles tense up all at once, and then release their tension when the stress passes.
Answer:
Here's what i'd put
Explanation:
My life now is very simple, because i go to school and come back and do homework while occasionally going out. If i became a teen parent, I'd become much more busy. I'd have a new life to take care of! I would probably get much less sleep and have to be up to take care of the baby, and I would have to spare so much time to take care of the baby. Having a baby right now might effect my education because I would barely have any time to even do school work or i might even have to drop out to get a job and have more money for all the thinks he or she might need.
