Question
How is the placenta connected to the embryo?
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Answer
An umbilical cord connects placenta with the embryo.
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i. Name the kind of virus they worked with and why?
ii. Why did they use two types of culture media to grow viruses in? Explain.
iii. What was the need for using a blender and later a centrifuge during their experiments? OR
iv. State the conclusion drawn by them after the experiments.
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