When a helium balloon rises in the air, it expands. if the volume of the balloon doubles, what happens to the density of the helium inside it

A. The density decreases by half.

B. The density doubles.

C. The density stays the same.

D. the density triples

How many hours is a first time mom in labor for?

After treatment that includes hospitalization and weight gain, anorexics:

Is the sternum an irregular bone?

An artificial membrane is created consisting of a lipid bilayer without protein molecules in the membrane. The lipid composition of the membrane is essentially the same as that of a normal, biological membrane.

Which statement describes the relationship between transcription and translation? A. The proteins made during transcription are used to make RNA during translation. B. The proteins made during transcription are used to make DNA during translation. C.

A patient with a personality disorder has unreasonable fears of abandonment, criticism, and rejection. what central issue of personality is distorted in this patient?

A woman with severe periodontal disease has a ___ times greater risk for a preterm infant with low birth weight compared with women with little or no periodontal disease.

Part 1: Which substance has a higher solubility? Part 2: Explain your answer for Part 1. Julia did an experiment to study the solubility of two substances. She poured 100 mL of water at 20 °C into each of two beakers labeled A and B.

The line of 49 degrees north latitude follows a ... A. National border B. Long river C. Mountain range S. State border

Which molecule crosses the plasma membrane by diffusion? oxygen glucose enzymes all of the above