Three weeks after conception,which of the following has happened in an embryo?

Question

Quizplus · Accepted Answer

Neural tube formation occurs approximately 3 weeks after conception, which marks the beginning of the development of the central nervous system.

Answer: C
 Limb bud formation also occurs approximately 3 weeks after conception, which marks the beginning of the development of the appendicular skeleton and musculature.

Therefore, both choices B and C are correct.

Three Weeks After Conception,which of the Following Has Happened in an Embryo