Question

There are some unspecialized cells in our body which have capacity to undergo mitosis and can redivide to produce number of identical cell. Name these types of cells and from where are these cells obtained in an embryo and adults.
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Answer 1

Unspecialized cells in our body which have the capacity to undergo mitosis and can redivide to produce a number of identical cells are called stem cells.

• Stem cells can give rise to different types of cells and are present both in embryonic (embryonic stem cells) and adult stages of development (adult stem cells).
• In an embryo, the stem cells are obtained from the protective layer of the blastocyst.
• In an adult, the sources of stem cells include bone marrow, skin, liver, blood, and brain.