*Question*
Q: What tool do scientist's use to show the evolutionary pathways and connections among organisms? Choices: - conceptual tree - superficial tree - photogenetic tree - phylogenetic tree A:
**Answer**
phylogenetic tree

*Question*
Q: Scientists explain the world based on what? Choices: - changes - patterns - theories - observations A:
**Answer**
observations

*Question*
Q: A pedigree is a chart which shows the inheritance of a trait over several what? Choices: - centuries - events - organisms - generations A:
**Answer**
generations

*Question*
Q: What regulates the thyroid gland in a body? Choices: - positive feedback loop - upper feedback loop - normal feedback loop - negative feedback loop A:
**Answer**
negative feedback loop