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Question 28 

The experiments with sea urchins conducted by Hans Driesch

showed that ...

Question 28 options:

proximal processes are also crucial for the development of sea urchins

the very early development of the embryo strongly depends on environmental input.

even at the four-cell stage of the embryo's development one can already detect primitive forms of limbs.

cells in a very early stage of development are pluripotent

cells in a very early stage of development are transcendental

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