Charles darwin observed the resemblance between organisms on the galápagos islands and those on the nearest coast. he hypothesized that the island organisms had evolved from the coastal organisms. what mechanism did darwin propose caused evolution?

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