37. High levels of carbon dioxide 

41. The CD4 protein in the helper T cell’s membrane binds to the ______________ in an APC’s membrane.

47. Describe the appearance of the oxygen-hemoglobin dissociation curve. What is on the x-axis? What is on the y-axis? Explain why it is important that this curve looks the way it does. 

Asthma involves all of the following except:

Dr. John Cena develops a new cure for broken limbs.  “Nubone” is a potion that regrows bone very quickly.  To test its efficacy, 100 people with broken bones are given potions: Half the people get the real drug (Nubone), and the other half drink a similarly-tasting, harmless liquid.  No one – not the patients or their doctors – know who is getting the actual drug. What is this kind of test called?

Dr. Strange is studying tomatoes.  Here are his two groups of plants: Group A: receives 10ml of nitrogen fertilizer, plus 50ml water daily. Group B: receives 0ml of nitrogen fertilizer, plus 100ml of water daily. If group A grows MORE than group B, what can you conclude?

What was the name of the organisms we used in our experiment

Let’s assume the phenotype SMART (high I.Q.) is expressed in homozygous recessive individuals only.  In the pedigree below, filled-in (black) symbols represent smart people; empty (white) symbols represent non-smart people.  Use the letters A and a to represent the two alleles. What is Natalie’s genotype?

Bill and Ted decide to work together on a science project.  One of them sits quietly in a chair and blows up a garbage bag.  The other one jogs around the block and then immediately blows up a garbage bag.  They each bubble their air through water with Phenolphthalein for one minute, and then they add drops of ammonia until the beakers turn identical shades of pink.  Please answer the following questions below: Let’s say that Bill’s water required 20 drops of ammonia to turn pink, and Ted’s water required 40 drops. Which is true?

  Bill and Ted decide to work together on a science project.  One of them sits quietly in a chair and blows up a garbage bag.  The other one jogs around the block and then immediately blows up a garbage bag.  They each bubble their air through water with Phenolphthalein for one minute, and then they add drops of ammonia until the beakers turn identical shades of pink.  Please answer the following questions below: What is the purpose of the ammonia?