When we breathe we inhale oxygen, O2, and exhale carbon dioxide, CO2, plus water vapor, H2O. Which likely has more mass, the air that we inhale or the same volume of air we exhale? Does breathing cause you to lose or gain weight?
A. The air we exhale has more mass; breathing causes you to lose weight.
B. The air we inhale has more mass; breathing causes you to lose weight.
C. The air we exhale has more mass; breathing causes you to gain weight.
D. The air we inhale has more mass; breathing causes you to gain weight.
Answer: A
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Judge the following sentence according to the criteria given below: Microscopic zooplankton are primary consumers BECAUSE they are herbivores
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Define the terms ecological succession and climax ecosystem. How do disturbances allow for ecological succession?
What will be an ideal response?
Under natural conditions, the sex ratio at birth is ________ boys born for every 100 girls
A) 105 B) 107 C) 110 D) 120
When you exhale, the major components of your breath include all of the following except
A) carbon dioxide. B) nitrogen. C) oxygen. D) hydrogen.