The majority of marine organisms are found in coastal regions, rather than the open ocean. Which of the following best explains why? (4 points)
O Ocean currents bring nutrient-rich water into coastal regions.
O The shallow waters of coastal regions provide less oxygen.
O Salinity is usually much higher in coastal regions.
O Temperatures are cooler in coastal regions.

In 1994, telomerase activity was discovered in human cancer cell lines. although telomerase activity is rarely present in human somatic tissue, this discovery indicated that humans do contain the genes for telomerase proteins and telomerase rna. since inappropriate activation of telomerase may contribute to cancer, why do you think the genes coding for this enzyme have been maintained in the human genome throughout evolution?