What is the sympathetic nervous system and what are some of the effects it has on the body?

The (blank) states that all loving things are made of cells.

All other things being equal the size of a population will decrease if

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?