Answer:
C. 3
Explanation:
An embryo forms three distinct cell layers, and each layer develops into different types of cells and organs.
I believe the answer is c. Herpes and HIV are STD's so it's like stuck with you. :) Hope this helped!
Answer:
During the first year of life, your baby will grow and develop at an amazing speed. Her weight will double by 5 to 6 months, and triple by her first birthday. And she is constantly learning. Major achievements—called developmental milestones—include rolling over, sitting up, standing and possibly walking.
Explanation:
Rolling over, crawling, walking, and talking are all considered milestones. The milestones are different for each age range. There is a normal range in which a child may reach each milestone. For example, walking may begin as early as 8 months in some children.
Your lungs. The lungs control your ph balance by releasing carbon dioxide
