In mammals, the contraction of the muscular expands the chest, pulling air into the lungs.

A. chest cavity
B. rib cage
C. trachea
D. diaphragm
E. sternum


D. diaphragm

Biology & Microbiology

You might also like to view...

A researcher in a lab finds a microscopic organism that is a producer. The organisms are found in

extreme environments (i.e., hot springs). The researcher has identified an organism belonging to the domain ____.

a. Bacteria b. Archaea c. Eukarya d. Animalia e. Amoeba

Biology & Microbiology

The processes of converting DNA into RNA then RNA into proteins is collectively referred to as which of the following?

a. Chargaff’s rule b. Mendel’s law of segregation c. Darwin’s theory of evolution d. the central dogma

Biology & Microbiology

The organism shown here represents the ____

stage in the life cycle. a. sporophyte b. gametophyte c. haploid d. motile e. feeding

Biology & Microbiology

By definition, prokaryotic cells do not possess __________

(a) a nucleus. (b) replication machinery. (c) ribosomes. (d) membrane bilayers.

Biology & Microbiology