Water covers approximately: a. 25% of Earth's surface

b. 50% of Earth's surface

c. 70% of Earth's surface

d. 95% of Earth's surface

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?

If it turned out dinosaurs were colorblind, how would this affect some assumptions scientists have made about them?

How does the burning of fossil fuels increase the greenhouse effect? by decreasing the absorption capacity of greenhouse gases by decreasing incoming solar radiation by releasing carbon dioxide into the atmosphere