Q: The normal respiratory rate per minute in adult humans is? Choices: - 6-12 breaths - 0-6 breaths - 18-24 breaths - 12-18 breaths A:
12-18 breaths

Q: How does the distance between galaxies change as the universe expands? Choices: - it decreases - it is unchanged - it becomes irrelevant - it increases A:
it increases

Q: Q: What is the principal cell of connective tissues? Choices: - organism - Cancer - neural - fibroblast A:
A: fibroblast

Question: Q: Kinetic energy is energy of this? Choices: - speed - gravity - food - motion A:
Answer: motion

*Question*
Q: What is the mechanism that accounts for the drifting of continents? Choices: - ridges spreading - earth spreading - volcanic spreading - seafloor spreading A:
**Answer**
seafloor spreading

(Q).
Q: Which blood cells serve to defend the body in various ways? Choices: - helper blood cells - blue blood cells - red blood cells - white blood cells A:
(A).
white blood cells