Scientists are creating vaccinations that prevent people from getting bird flu. If the virus mutates, a new vaccine needs to be made. The vaccine needs to be tested, which can be dangerous. It also takes a long time for scientists to know whether the vaccine works.
Answer:
lungs
Explanation:
The infant lungs and central nervous system are proceeding to develop during the third trimester that is about 34 week. The skin has grown soft and delicate, and she's stretching out and growing also rounder.
C. A force three times your body weight
Answer:
True
Explanation:
I had a whole unit on this in CHild Development
