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. (1)

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