What are the genotypes of the remaining chromosomes

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

When energy is used, atp molecules convert to adp molecules. this process is called

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?