Use zygote, morula and blastocyst evidence to distinguish stem-cell potency, compare embryo structure and evaluate medical or ethical arguments for therapies.
All living organisms are made of cells. Some cells are specialised for their function.
A fertilised egg cell develops into a morula and then a blastocyst. Which of the following are correct statements? 1. A blastocyst contains pluripotent stem cells. 2. A blastocyst is a hollow ball of cells whereas a morula is not. 3. Both of these structures contain cells which divide by meiosis. □ A 1 and 2 only □ B 1 and 3 only □ C 2 and 3 only □ D 1, 2 and 3
The only correct answer is A1 and 2 only
B is not correct because the cells divide by mitosis
C is not correct because the cells divide by mitosis
D is not correct because the cells divide by mitosis