Help me answer this biology question Urgent

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.