Type of muscle that connects ta junctions called intercalated disks

What occurs to the cell during mitosis

Earth is tilted on its axis. which of these would not exist if earth had no tilt?

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?