Given a scientific question, generate a correct answer to it.

Input: Consider Input: Inside each lymph node is a honeycomb of connective tissue with spaces filled by what?

Output: white blood cells

Input: Consider Input: What process provides over 99 percent of the energy for life on earth?

Output: photosynthesis

Input: Consider Input: In some plants, the sporophyte is diploid, while the gametophyte is what?
Output: haploid