Samantha plans an investigation in which she will study a population of animals. Which of these answers best describes the focus
of Samantha’s study? A. the cats and dogs at a local animal shelter
B. a single cat that lives in her house
C. all of the pets owned by her classmates
D. all of the cats in her neighborhood
Population of animals so the main animal isn’t specified, A B D all talk about cats or dogs. to have a better general idea of animals it would be best and unbiased to survey C all the possible pets owned by her classmates
The lower respiratory tract is sometimes referred to as the tracheobronchial tree, this describes the branching structure of airways supplying air to the lungs, this includes the trachea, bronchi and bronchioles.
