The last stage of embryonic development where the embryonic stem cells are found is the blastocycst. In this stage the cell differentiates and group themselves into different body parts and specialized cells. This stage is reached with in the period of 3 to 5 days of the embryo development.
Explanation:
Science is the study of the nature and behaviour of natural things and the knowledge that we obtain about them. ... A science is a particular branch of science such as physics, chemistry, or biology. Physics is the best example of a science which has developed strong, abstract theories.
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The primary source of energy for almost every ecosystem on Earth is the sun
Most comets are long period but they spend most time of their existence far away from the sun.
