Explain how you know that the water from Lake Erie flows north through the Niagara River and into Lake Ontario.

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

Coral have a symbiotic relationship with what in order to eat?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes