What is the scientific study of the universe including the observation and interpretation of celestial bodies and phenomena?

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

Which factor that affects biodiversity?

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?