PLEASE HELP TIMED!
1. By the end of the 2nd trimester, the baby's skeleton is:
A. Hard
B. Soft
C. Just beginning to form
D. None of the above
2. When is the baby called an embryo
A. 7-9 months
B. 4-6 months
C. 1-7 days
D. 10 days to 8 weeks
3. Which of the following stages is a blastula/ blastocyst?
A. 0-4 days
B. 9-40 weeks
C. 7-9 days
D. 5-7 days
3. Which of the following stages is a morula?
A. 0-4 days
B. 9-40 weeks
C. 7-9 days
D. 5-7 days
4. When does the placenta begin to form?
A. 10-15 days
B. 9-40 weeks
C. 7-9 days
D. 5-7 days