Unique characters evolve over long periods of time. The time that a particular character arose can be estimated by determining:
A. shared presence of the character in
descendants of the population in which the
character first arose.
B. shared presence of the character in
descendants of the population who did not
have the character.
C. presence of the character in only the most
recent species to have it.
D. how long the character was in the
population.
A
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Two types of cholesterol are found in human blood, HDL and LDL. Clinical studies have shown that
the risk of coronary heart disease is greatest for a person with a ____ level of HDL in their blood and a ____ level of LDL in their blood.
a. high; low b. low; low c. low; high d. low; moderate e. moderate; moderate
What are the functions of the 5' cap and poly(A ) tail of mature mRNAs in eukaryotes?
What will be an ideal response?
What step of inflammation is enhanced by the presence of opsonins?
A) the clearance of the infection by phagocytosis B) when foreign matter is contained C) when capillaries dilate and become more permeable D) when macrophages engulf debris and foreign matter E) when additional leukocytes are recruited to the region
Burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because
A) it grows in disinfectants. B) it is a gram-negative rod. C) it causes infections in cystic fibrosis patients. D) it causes melioidosis. E) its rRNA sequence is similar to that of Neisseria.