Q: When a balloon is rubbed against hair, why do they attract each other? Choices: - constantly electron charge - lean electron charge - same electron charge - opposite electron charge A:
opposite electron charge

(Question)
Q: In amniotes that lay eggs, the shell of the egg provides protection for the developing embryo while being permeable enough to allow for the exchange of carbon dioxide and this? Choices: - gas - tissue - Protein - oxygen A:
(Answer)
oxygen

Ques: Q: What is the standard unit for mass? Choices: - ounce - meter - pound - kilogram A:
Ans: kilogram

(Q).
Q: Which compound has positively and negatively charged ends? Choices: - tumultuous compound - non-polar compound - real compound - polar compound A:
(A).
polar compound

Ques:Q: Two important concepts, niche and habitat, are associated with what? Choices: - natural selection - plant - water - ecosystem A:

Ans:ecosystem

Q: Difference in electric potential energy are measured in what basic unit? Choices: - moles - watts - knots - volts A:
volts