Q: Resonance has been used in what kind of human-made recreational objects since prehistoric times? Choices: - toys - paintbrushes - arrows - musical instruments A:
musical instruments

(Question)
Q: What type of gas is a harmless gas that living things add to the atmosphere during respiration? Choices: - helium - oxygen - Hydrogen - carbon dioxide A:
(Answer)
carbon dioxide

Ques: Q: Where do the majority of species live? Choices: - air - trees - land - ocean A:
Ans: ocean

(Q).
Q: Pressure, volume, and temperature are related by which law? Choices: - Law of Conservation - law of inertia - Murphy's Law - gas law A:
(A).
gas law

Ques:Q: What process involves two cell divisions and produces four haploid cells? Choices: - mutations - Mitosis - Klerokinesis - meiosis A:

Ans:meiosis

Ques:Q: Vertebrates have tissues which are organized into organs which in turn are organized into what? Choices: - artificial systems - information systems - maturation systems - organ systems A:

Ans:
organ systems