Q: Over many generations, the resulting genetic diversity provides valuable raw material for what? Choices: - coral selection - characteristic selection - intelligent selection - natural selection A:
natural selection

Q: Sepals, petals, stamens, and carpels are what kind of organs? Choices: - animal - reproductive - marine - floral A:
floral

Q: Q: In a hot water heater, burning fuel causes the water to get hot because combustion is what type of reaction? Choices: - endothermic - geothermal - biochemical - exothermic A:
A: exothermic

Question: Q: Cells in a biofilm secrete what to recruit nearby cells? Choices: - signaling proteins - harnessing molecules - signaling neurons - signaling molecules A:
Answer: signaling molecules

*Question*
Q: The simplest example of what type of 'organ system' is the gastrovascular cavity found in organisms with only one opening for the process? Choices: - cardiovascular - respiratory - nervous - digestive A:
**Answer**
digestive

(Q).
Q: What waves do radio and television use? Choices: - sound waves - light waves - gamma waves - radio waves A:
(A).
radio waves