PLEASE HELP PLEASE why is it difficult for scientists to study the mechanism of evolution

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment. svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment. svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment. svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.