1) Binary stars are extremely rare and over 90% of all stars are similar to our Sun in that they don't have a gravitational star companion(s). * true or

False

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The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

What is the term for the two sets of chromatids formed in the parent cell a.haploid b.diploid c.gamete d.tetrad

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes