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
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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
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
The organism shown here represents the ____
stage in the life cycle. a. sporophyte b. gametophyte c. haploid d. motile e. feeding
By definition, prokaryotic cells do not possess __________
(a) a nucleus. (b) replication machinery. (c) ribosomes. (d) membrane bilayers.