Which specialized cells act as a barrier to protect tissues within the body? epithelial cells
neurons
red blood cells
smooth muscle cells

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.