A pale or ashen color of the skin that may result from severe anemia is called __________.
Fill in the blank(s) with the appropriate word(s).
pallor
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Chromosomes are composed mainly of DNA.
Answer the following statement true (T) or false (F)
The layer of stretchy fibers found between the media and adventitia is called the ________.
Fill in the blank(s) with the appropriate word(s).
Callopistes maculatus, the dwarf tegu, is a teiid lizard that occurs in desert habitats in Chile
A study of its daily activity cycle in summer showed a decrease in activity during midday, although the body temperatures of the lizards that were active in midday were not different from the body temperatures of lizards that were active in the morning or afternoon. That observation is not consistent with the hypothesis that midday temperatures are so high that the lizards must seek shelter to avoid overheating. Apparently dwarf tegus in this habitat are able to maintain their normal activity body temperatures throughout the day. What alternative hypothesis can you suggest to account for the decrease in activity of dwarf tegus in midday? If your hypothesis is correct, what additional concern does it suggest about the potential effect of global climate change on lizards?
Which of the following structures does not pass through the hilum of the lungs?
A. Pulmonary arteries B. Superior (lobar) bronchi C. Pulmonary trunk D. Main (primary) bronchi E. Pulmonary veins