Task: Paraphrasing
Input (English): Question: Invertebrates (and higher animals) can also be placed in one of two groups based on how they develop as what? 
Answer: embryos. 
Sentence: Invertebrates (and higher animals) can also be placed in one of two groups based on how they develop as embryos.
Output (English): How invertebrates (and higher animals) develop as embryos determines how they are placed within one of two groups.