Q: What is defined as a saturated layer of rock or soil? Read this paragraph and choose the correct option from the provided answers: An aquifer is 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? Read this paragraph and choose the correct option from the provided answers: McKay Savage. Color vision may have developed to help our ancestors distinguish between ripe and unripe fruits . CC BY 2.0. 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? Read this paragraph and choose the correct option from the provided answers: Prokaryotes are single-celled organisms that lack a nucleus. They are placed in two domains: the Bacteria Domain and the Archaea Domain. They were the first organisms to evolve. It's not certain how they are related to each other or to eukaryotes. Choices: - protists - fungi - eukaryotes - prokaryotes A:
A: prokaryotes

Question: Q: What is the study of the chemical elements necessary for plant growth called? Read this paragraph and choose the correct option from the provided answers: 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? Read this paragraph and choose the correct option from the provided answers: The increase in electrons across the periodic table explains why elements go from metals to metalloids and then to nonmetals from left to right across the table. Look at period 2 in Figure below as an example. Lithium (Li) is a metal, boron (B) a metalloid, and fluorine (F) and neon (Ne) are nonmetals. The inner energy level is full for all four elements. This level has just one orbital and can hold a maximum of two electrons. The outer energy level is a different story. This level has four orbitals and can hold a maximum of eight electrons. Lithium has just one electron in this level, boron has three, fluorine has seven, and neon has eight. Choices: - neutrons - temperature - protons - electrons A:
**Answer**
electrons

*Question*
Q: Getting the same result when an experiment is repeated is called what? Read this paragraph and choose the correct option from the provided answers: Scientists also have to "check their work. " The results of an investigation are not likely to be well accepted unless the investigation is repeatedusually many timesand the same result is always obtained. Getting the same result when an experiment is repeated is called replication . If research results can be replicated, it means they are more likely to be correct. Repeated replication of investigations may turn a hypothesis into a theory. On the other hand, if results cannot be replicated they are likely to be incorrect. Choices: - mutation - initiation - repetition - replication A:
**Answer**
replication