Q: What is the major source of water vapor in the atmosphere? Choices: - drift - sea - streams - ocean A:
ocean

Q: What was once believed to be the smallest of all particles, as dalton's theory proposed? Choices: - nucleus - molecule - neutron - atom A:
atom

Q: Q: What do we call an interruption in the normal conduction pathway of the heart? Choices: - heart attack - infarction - heartburn - heart block A:
A: heart block

Question: Q: Toward the late stages of pregnancy, a drop in progesterone and stretching forces from the fetus lead to increasing uterine irritability and prompt labor. contractions serve to dilate the cervix and expel this? Choices: - blood - tissues - uteris - newborn A:
Answer: newborn

*Question*
Q: What is the long-term average of weather in a particular spot called? Choices: - weather - migration - temperature - climate A:
**Answer**
climate

Q: Q: What determines the length and thickness of dna chromosomes? Choices: - degree of rna coiling - type of dna - number of chromosomes - degree of dna coiling A:
A: degree of dna coiling