In pneumothorax, the lung collapses because .

a. intrapleural pressure is lower than transpulmonary pressure
b. intrapleural pressure is equal to intrapulmonary pressure
c. intrapulmonary pressure is lower than transpulmonary pressure
d. intrapulmonary pressure is higher than atmospheric pressure

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing