Q: What are the "levels" in a food chain or web called? Choices: - parts - root - gauges - trophic A:
trophic

(Question)
Q: When a seed is produced by apomixis, the embryo develops without what? Choices: - infection - stimulation - infection - fertilization A:
(Answer)
fertilization

Ques: Q: What is the conversion of metals from their ores to more useful forms called? Choices: - thermodynamics - nanotechnology - crystallography - metallurgy A:
Ans: metallurgy

(Q).
Q: Which highly valuable substance found in jewelry has a density of about 19 g/cm^3? Choices: - diamonds - rubies - silver - gold A:
(A).
gold

Ques:Q: What are mercury manometers often used to measure? Choices: - weight - balance - brain waves - blood pressure A:

Ans:blood pressure

Q: Viroids are plant pathogens much simpler than what, but like them can reproduce only within a host cell? Choices: - pests - bacteria - parasites - viruses A:
viruses