Describe how a cuticle could have evolved through natural selection.

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

What word is used to describe differences of individual organisms

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.