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2) There are three types of stem cells that occur during the growth and development of...

2) There are three types of stem cells that occur during the growth and development of a multicellular organism, which of these developmental structures contains a stem cell/cells that are referred to as TOTIPOTENT?
A) Zygote B) Trophoblast C) Blastocyst D) Central Nervous System
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Answer #1

A) Zygote.

A zygote formed by the fusion of male and female gamete has the capability to divide into any kind of cell of the body as well as extraembryonic or placental cells, i.e., it has the ability to give rise to a complete organism on it's own. Trophoblast and blastocyst contain pluripotent stem cells, that can give rise to all cells in the body, but are not capable of forming placental support cells. Central nervous system contains mostly differentiated cells and not stem cells. In adults, bone marrow is considered to be the stem cell reservoir of multipotent cells.

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