Q: What is defined as a saturated layer of rock or soil? Choices: - river bank - artesian well - culvert - aquifer A:
aquifer

Q: What may have developed to help our ancestors distinguish between ripe and unripe fruits? Choices: - fine motor skills - acute hearing - night vision - color vision A:
color vision

Q: Q: What are single-celled organisms that lack a nucleus called? Choices: - protists - fungi - eukaryotes - prokaryotes A:
A: prokaryotes

Question: Q: What is the study of the chemical elements necessary for plant growth called? Choices: - photosynthesis - phototropism - plant propagation - plant nutrition A:
Answer: plant nutrition

*Question*
Q: An increase in what, across the periodic table, explains why elements go from metals to metalloids and then to nonmetals? Choices: - neutrons - temperature - protons - electrons A:
**Answer**
electrons

*Question*
Q: Getting the same result when an experiment is repeated is called what? Choices: - mutation - initiation - repetition - replication A:
**Answer**
replication