How does cystic fibrosis increase the risk of respiratory infections such as bronchitis and pneumonia? a. by causing mucus to build up in airways.

b. by destroying cells of the immune system.

c. by reducing blood flow to the lungs.

d. by increasing air flow to the lungs.

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

2. if someone had the list of traits you provided in question 1, do you think he or she would be able to find you in a group of 1000 people? why or why not? if not, what other information encoded in your genes might distinguish you from the others in the group? what are other traits that are encoded for by dna?

In the practice of science, this type of reasoning is used to develop explanations.