(Q).
Q: What do vectors possess that scalars do not? Choices: - height and polarity - direction and texture - magnitude and weight - magnitude and direction A:
(A).
magnitude and direction

(Q).
Q: What substances, which serve as catalysts, are involved in most of the chemical reactions that take place in organisms? Choices: - proteins - vitamins - carbohydrates - enzymes A:
(A).
enzymes

(Q).
Q: Objects moving at different speeds, in different directions have different what? Choices: - protons - vibrations - electrons - velocities A:
(A).
velocities