A scientist is investigating the chemical properties of a hydrogen atom (H), which has an electroegativtiy of 2.1, and a chlorine atom (Cl), which has an electronegativity of 3.0. Suppose these two atoms form a chemical bond resulting in the compound HCl. Predict whether the compound is held together by an ionic, a polar covalent, a nonpolar covalent, or a hydrogen bond. Explain your prediction. Describe the bond in terms of its electrical charg

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

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According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.