A major function of bile is to emulsify fats. Indicate whether the statement is true or false
True
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Which of the following types of leukocytes is typically elevated in cases of bacterial, rather than viral or helminthic, infection?
A. Eosinophils B. Neutrophils C. Basophils D. Monocytes
Fourteen homologous genes encoding globins (hemoglobin, myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago. What term best describes the relationship between these genes?
A. moderately repetitive sequences B. gene family C. sister chromatids D. highly repetitive sequences E. gene cluster
The deep-sea vent hypothesis for the formation of prebiotic organic molecules is based on
A. temperature gradients of the hot water coming from the vents and cold ocean water. B. hot gaseous substances released from the vents. C. a buildup of radioactive substances around the vents. D. temperature gradients of the hot water coming from the vents and cold ocean water and hot gaseous substances released from the vents are correct answers. E. temperature gradients, proton gradients, and radioactive substances could all lead to the formation of prebiotic organic molecules.
What can paleoecologists utilize to assess which tree species existed in an area?
A) climate models B) soil types C) DNA from current trees D) ancient pollen