Which of the following describes an independent variable? A. The factor in an experiment that is not under observation B. The factor in an experiment that is deliberately kept the same C. The factor in an experiment that is deliberately changed D. The factor in an experiment that responds to the manipulated variable​

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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pls mark as brainliest

the tricuspid valve is present between right atrium and right ventricle

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

linnaeus is the father of taxonomy

explanation:

which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.