Since the arteries keep pace with the heart ,you can measure the heat rate by counting the contractions of the arteries
true
false

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Which type of scientific statement is defined as a hypothesis or group of hypotheses that can be accepted as true based on the repeated experimentation with similar results

What causes darkening of the skin as melanin production increases