When the blastocyst burrows deep into the uterine lining, ...

[Caiter2013]

When the blastocyst burrows deep into the uterine lining, __________.
 
  A) implantation occurs
  B) pregnancy does not occur
  C) it stops growing
  D) the cells of the zygote first duplicate

Question 2

Which statement about a blastocyst is true?
 
  A) It consists of a single cell.
  B) It is a structure that feeds the developing organism.
  C) Between the seventh and ninth days, it burrows deep into the uterine lining.
  D) It is a membrane that helps to keep the temperature of the prenatal world constant.

[Dinolord]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: C

[Caiter2013]

Thanks for the timely response, appreciate it

[parker125]

Gracias!