1. Count the number of nucleotides present in the DNA molecule: _ nucleotides. 2. The location of a hydrogen bond.

3. Identify the bases that pair together.

_ and _

_ and _

4. Describe two reasons why the image you chose shows a double helix.

Long term exposure to waves can cause sunburns and skin cancer.

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.

Climate like that in the sahara desert have the fastest rates of weathering