Justify the claim that photosynthetic organisms that live less than 25 feet below the surface of the ocean need allophycocyanin to survive. Provide reasoning that explains thus claim

What did hunter gathers do to alter the environment?

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water

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