When a solution has a lower solute concentration than the cell, which of the following types of solutions is the cell in

a. isotonic
b. isosmotic
c. hypotonic
d. hypertonic

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

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.

When animals eat, the food is stored and digested in the stomach or a similar structure. but when a unicellular organism like this paramecium eats, the food is stored in which organelle