Select the correct answer. What are the basic building blocks of DNA and RNA?
A. nucleotides
B. phosphorous
C. proteins
D. sugar

Where would you most likely not find an alpine glacier? the himalayas the rockies the andes flat areas of antarctica

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer