I’m having trouble with the question can someone help

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

Dna and rna share a number of similarities,but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million