Which mammalian lineage has two species of spiny anteaters (echidnas) and the duck-billed platypus as the only known living members?
a. Marsupialia
b. Monotremata
c. Strepsirhini
d. Rodentia
Ans: b. Monotremata
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There are a number of geological processes that affect fluxes of carbon; some are summarized in Figure 25.9 and mentioned in your text. For each scenario below, indicate whether atmospheric CO2 should increase or decrease
plate tectonics that result in the formation of an ocean basin [increase / decrease] What will be an ideal response?
Based on the composition of the plasma membrane, how do you predict a protein with one section of hydrophobic amino acids and one section of hydrophilic amino acids would be situated in the membrane?
A) The hydrophobic portion of the protein could embed in the membrane, and the hydrophilic portion could extend into the cell. B) Both the hydrophobic and hydrophilic portions of the protein could embed in the membrane. C) This protein could not be found in the membrane. D) The hydrophilic portion of the protein could embed in the membrane, and the hydrophobic portion could extend into the cell.
Which one of the following is found directly beneath the cells of an epithelial tissue?
A) fibrous connective tissue B) basement membrane C) collagen and elastic fibers D) bi or multipolar extensions E) muscle tissue
The actual transport of protons by the proton pump is mediated by a transmembrane protein which undergoes a change in its
A. immunity. B. amino acid sequence. C. net charge. D. solubility. E. conformation.