Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Invertebrates (and higher animals) can also be placed in one of two groups based on how they develop as embryos.

Answer: Invertebrates (and higher animals) can also be placed in one of two groups based on how they develop as what?


Question: Embryos usually don't survive if they have extra or too few of these genetic units?

Answer: Embryos usually don't survive if they have extra or too few of these genetic units?


Question: A turbine using tides in the ocean can create electricity energy.

Answer:
A turbine using tides in the ocean can create what type of energy?