What’s a high school level of understanding of cellular respiration

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

Which prefix mean under less or below