Place the events of a cardiac cycle in order, starting with the return of deoxygenated blood to the heart.
a. The blood is routed to the body via the aorta.
b. The blood flows into the left ventricle.
c. The blood is directed to the left atrium.
d. The blood returns from the body to the right atrium.
e. The blood is sent to the lungs to pick up oxygen.
f. The blood flows into the pulmonary artery.
g. The blood flows into the right ventricle.
h. The blood flows into the pulmonary vein.
a. 8
b. 7
c. 6
d. 1
e. 4
f. 3
g. 2
h. 5
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Refer to the paragraph about the formation of the Isthmus of Panama. The sister populations on opposite sides of the isthmus are true species under which species concept?
A) the morphological species concept B) the biological species concept C) the phylogenetic species concept D) both the morphological species and phylogenetic species concepts E) the morpholoogical species, biological species, and phylogenetic species concepts
A somatic cell divides to form two genetically identical daughter cells during mitosis. Prior to mitosis, what must
occur?
a. The cell must replicate its DNA. b. The cell must first be fertilized. c. The nucleus must divide. d. Chromatids must be separated. e. The nuclear envelope must disintegrate.
Ethology is the scientific study of
A. None of the answer choices is correct. B. animal behavior. C. inheritance. D. plants. E. how organisms interact with the living and nonliving components of their environment.
Catenanes are interlocked chromosomes that form during the termination stage of DNA replication.
Answer the following statement true (T) or false (F)