By the end of which month/period of pregnancy is the human embryo's heart formed?
AOne month
BFive months
CSeven months
DThree months
Answer & Solution
Correct answer: A. One month
**As per your syllabus, ** the embryo's **heart is formed after one month** of pregnancy.
By 2 months → limbs and digits
by 12 weeks → most organ systems formed
by 5 months → first movements
by 24 weeks → fine body hair, eyelids separate.
Keep practising Unit 8O: Population Growth & Carrying Capacity
Browse all Unit 8O: Population Growth & Carrying Capacity questions for AP Biology, or explore more Biology topics.
Related questions
Oral contraceptive pills are typically taken for how many days followed by what gap?IUDs are particularly suitable for women who wish to:Which of the following is a hormone-releasing IUD?Diaphragms, cervical caps and vaults work by:'Nirodh' is a popular brand of which contraceptive in India?Withdrawal or coitus interruptus prevents conception by:Lactational amenorrhea as a contraceptive method is effective only up to a maximum period In the periodic-abstinence method, couples avoid coitus between which days of the menstrua