8. Every cell contains a lipid bilayer known as the membrane. Cell membranes are made up of which biomolecule? *
A. carbohydrates
B. nucleic acids
C. lipids
D. proteins

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

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

How would the function of synovial joints be changed if they lacked joint cavities and the bones were united instead?