@dapengliu25

Which came first, mammals or flowers? Evidence in the fossil record indicates mammals were first, but this is misleading. Flowers are less likely to be preserved due to their delicate structure, whereas a mammal has bones that are more easily preserved. All life is said to have begun in the oceans and oceans do contain a flowering plant that may have existed long before water creatures crawled out of the water, becoming amphibians and living on land. The only flowering plant that grows completely underwater in the ocean is seagrass; it has roots, stems, leaves, and produces flowers and seeds, making it a true flowering plant that lives in the ocean.

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