Q: What do corals secrete that builds up to become a coral reef? Choices: - membrane - mucous - scales - exoskeleton A:
exoskeleton

Q: The only obvious difference between boys and girls at birth is what type of organs? Choices: - digestive - respiratory - nervous - reproductive A:
reproductive

Q: Q: Where do birds store and moisten food that is waiting to be digested? Choices: - nest - tree - gullet - crop A:
A: crop

Question: Q: What is the term for the slow wearing down of rocks on earth's surface? Choices: - slipping - evaporation - experiencing - weathering A:
Answer: weathering

*Question*
Q: Which planet is the kuiper belt closest to? Choices: - Mars - Jupiter - Venus - neptune A:
**Answer**
neptune

(Q).
Q: What body part boasts three articulations and includes the patella? Choices: - ankle - hip - elbow - knee A:
(A).
knee