Q: The posterior pituitary releases which hormone, which stimulates uterine contractions during childbirth? Choices: - estrogen - insulin - estradiol - oxytocin A:
oxytocin

Q: What has increased the greenhouse effect? Choices: - ozone depletion - temperature changes - climate change - human actions A:
human actions

Q: Q: What is evolution that occurs over a long period of time called? Choices: - spontaneous mutation - introgression - catabolism - macroevolution A:
A: macroevolution

Question: Q: What gas is expired out of the body during exhalation? Choices: - carbon monoxide - hydrogen - oxygen - carbon dioxide A:
Answer: carbon dioxide

*Question*
Q: How many types of mechanical waves are there? Choices: - five - nine - one - three A:
**Answer**
three

(Question)
Q: Chloroplasts, chromoplasts, and leucoplasts are all plastids, organelles found in what kind of cells? Choices: - animal cells - lung cells - heart cells - plant cells A:
(Answer)
plant cells