Q: What consist of chains of small molecules called nucleotides? Choices: - Atomic acids - structural acids - nitrous acids - nucleic acids A:
nucleic acids

Q: Vectors along the same line can be what to one another like ordinary numbers? Choices: - noted - taken - lost - added A:
added

Q: Q: What is formed when an acidic solution and a basic solution react together in a neutralization reaction? Choices: - Sodium - seawater - shallow - salt A:
A: salt

Question: Q: What are the two most abundant elements in the universe? Choices: - hydrogen and oxygen - nitrogen and carbon - oxygen and carbon - hydrogen and helium A:
Answer: hydrogen and helium

*Question*
Q: What must two nuclei do for fusion to occur? Choices: - explode - melt - repel each other - collide A:
**Answer**
collide

*Question*
Q: Respiratory development in the embryo begins around week 4. ectodermal tissue from the anterior head region invaginates posteriorly to form olfactory pits, which fuse with endodermal tissue of the developing pharynx. an olfactory pit is one of a pair of structures that will enlarge to become this? Choices: - anal cavity - eye cavity - fluid cavity - nasal cavity A:
**Answer**
nasal cavity