Factors are living things. Example of living things include ___ and ___

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

What is the importance of dna replication to all living organisms?

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?