Ques: Q: What is the tail bone an example of? Read this paragraph and choose the correct option from the provided answers: Some of the most interesting evidence for evolution comes from vestigial structures . These are body parts that are no longer used but are still present in modern organisms. Examples in humans include tail bones and the appendix. Choices: - invertebrate structure - parasitic structure - primordial structure - vestigial structure A:
Ans: vestigial structure

Ques: Q: The normal response of the respiratory system to elevated ph is to increase the amount of what in the blood? Read this paragraph and choose the correct option from the provided answers: Respiratory Compensation Respiratory compensation for metabolic acidosis increases the respiratory rate to drive off CO2 and readjust the bicarbonate to carbonic acid ratio to the 20:1 level. This adjustment can occur within minutes. Respiratory compensation for metabolic alkalosis is not as adept as its compensation for acidosis. The normal response of the respiratory system to elevated pH is to increase the amount of CO2 in the blood by decreasing the respiratory rate to conserve CO2. There is a limit to the. Choices: - glucose - acid - red blood cells - co2 A:
Ans: co2

Ques: Q: What lengths are positive for converging lens and negative for diverging lens? Read this paragraph and choose the correct option from the provided answers: - For lenses, the distance from the center of the lens to the focus is . Focal lengths are positive for converging lens and negative for diverging lens. The distance from the center of the lens to the object in question is , where distances to the left of the lens are positive in sign. The distance from the center of the lens to the image is . This number is positive for real images (formed to the right of the lens), and negative for virtual images (formed to the left of the lens). Choices: - light lengths - wavelengths - differential lengths - focal lengths A:
Ans: focal lengths

Ques: Q: Isotopes have different number of these in their nuclei? Read this paragraph and choose the correct option from the provided answers: Isotopes have different numbers of neutrons in their nuclei. Choices: - protons - electrons - atoms - neutrons A:
Ans:
neutrons