Bronchioles are small passageways in the respiratory tree that are free from cartilage and glands. They are formed by the repeated branching of larger bronchi and are part of the system that conducts air towards the site for gas exchange.
Terminal bronchioles are lined by simple columnar epithelia containing club cells that secrete surfactant. What is the
function of surfactant?
A)
Surfactant is a hormone secreted to regulate gas exchange in the alveoli
B)
Surfactant provides a fluid medium for the dissolving of gases in the
alveoli
C)
Surfactant prevents the bronchioles and alveoli from collapsing during
expiration.
D)
Surfactant traps any pollutants and dust particles that have made it
through the respiratory passages.

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

How does natural selection change thephenotypes within a population over time?

Benito is doing research on the effects of florida's elevation on its climate. his notes include the following: 1. the average elevation of florida is 30 m above sea level. 2. the highest point in florida is britton hill, which is 105 m above sea level. 3. the change in temperature from 0 m to 1,000 m is 7 °c. what can benito conclude about the effects of florida's elevation on its climate? a.) florida typically experiences cold temperatures and temperature changes within a narrow range. b.) florida typically experiences cold temperatures and temperature changes within a broad range. c.) florida typically experiences warm temperatures and temperature changes within a narrow range. d.) florida typically experiences warm temperatures and temperature changes within a broad range.