Q: What do scientist's believe mercury's core is mostly made of? Choices: - water - quicksilver - helium gas - melted iron A:
melted iron

(Question)
Q: Commensalism, mutualism, and parasitism are known as what type of relationships? Choices: - simple - peculiar - various - symbiotic A:
(Answer)
symbiotic

Ques: Q: What lipid, added to certain foods to keep them fresher longer, increases the risk of heart disease? Choices: - Omega-3 fatty acids - fatty acids - cholesterol - trans fat A:
Ans: trans fat

(Q).
Q: Platinum and gold are useful materials for constructing circuits because of their ability to resist what? Choices: - Electricity - decomposition - nitrogen - oxidation A:
(A).
oxidation

Ques:Q: What two planets is the asteroid belt found between? Choices: - Jupiter and Earth - Mars and Earth - Jupiter and Saturn - mars and jupiter A:

Ans:mars and jupiter

Ques: Q: Each species has a characteristic number of what coiled structures made of dna and proteins? Choices: - genes - ribosomes - prokaryotes - chromosomes A:
Ans:
chromosomes