Q: What do you call a device that produces a very focused beam of visible light of just one wavelength and color? Choices: - optical diffuser - fusion relay - light meter - laser A:
laser

(Question)
Q: All members of a species living together form a what? Choices: - family - group - organization - population A:
(Answer)
population

Ques: Q: Kidney stones can form anywhere in what system? Choices: - digestive - respiratory - intestinal - urinary A:
Ans: urinary

(Q).
Q: Which part of the earth is made of the rigid, brittle, solid crust and uppermost mantle? Choices: - troposphere - thermosphere - atmosphere - lithosphere A:
(A).
lithosphere

Ques:Q: About 50% of all animal species died off between the mesozoic and which other era? Choices: - jurassic - precambrian - cretaceous - cenozoic A:

Ans:cenozoic

Q: The value that occurs most often in a data set is called the? Choices: - median - mean - type - mode A:
mode