An individual with the disorder xeroderma pigmentosum is hypersensitive to sunlight succumbs to dna damage caused by light exposure. what is the probable cause for this disorder?
a. a fear of exposure to sunlight
b. a defect in a dna repair enzyme
c. an improper hormonal mechanism

Which statement describe events that occur during interphase?

Unlike mendel's pea plants,humans can have a variety of heights,not just tall or short.what does this mean for human height? a.height is controlled by one gene b.height is controlled by more than one c.height is not genetic d.height is solely determined by whether or not you eat your vegetables

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?