After reading the passage about acupuncture, identify which scientific claim explains why some people say acupuncture does not truly relieve pain. It blocks pain channels.
It is unclear how it works.
It provides only a placebo effect.
It is ancient medicine, not modern medicine.

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

Which molecule is called "molecule of hereditary?